2 Camels have humps

Which is the biggest animal? The biggest animal that has ever lived is the blue whale-it is even larger than the biggest dinosaurs were. Blue whales can weigh as much as 150 cars! Female Queen Alexandm birdwings are the world's biggest butterflies. Their wings are as big as this page! The blue whale is so long that eight elephants could stand along its back. The giraffe is the tallest land animal. With its long neck, it can reach as high as a two-storey house. The mighty African elephant is the biggest land animal on Earth. It is three times tall as you are and can weigh as much as seven cars. The ostrich is the world's tallest and heaviest bird. It's as tall as a single-decker bus! The whale shark weighs as much as 40 cars. It's the world's biggest fish. The reticulated python can grow to be as long as a row of six bicycles! It's the world's longest snake.

哪个是最大的动物？ 有史以来最大的动物是蓝鲸——它甚至比最大的恐龙还要大。 蓝鲸的体重可达150辆汽车！雌性亚历山大女王鸟的翅膀是世界上最大的蝴蝶。 它们的翅膀有这一页那么大！蓝鲸是如此之长，以至于八头大象可以站在它的背上。 长颈鹿是最高的陆地动物。 它的脖子很长，可以达到两层楼那么高。 强大的非洲象是地球上最大的陆地动物。 它的身高是你的三倍，重量相当于七辆汽车。 鸵鸟是世界上最高、最重的鸟。 它和单层公共汽车一样高！鲸鲨有40辆汽车那么重。 它是世界上最大的鱼。 网纹蟒可以长到一排六辆自行车那么长！它是世界上最长的蛇。

What's the difference between sharks and dolphins? Although sharks and dolphins look alike, they belong to two very different animal groups. A shark is a kind of fish, but dolphins are members of another group, the mammals. You don't look anything like a dolphin. but you are a mammal. too! If an animal breathes air into lungs, and its babies feed on their mother's milk, it's a mammal. Most mammals have some fur or hair on their bodies. If an animal has feathers and hatches out of a hard-shelled egg, it's a bird. All birds have wings, and most of them can fly. If an animal has six legs and three parts to its body, it's an insect. There are more kinds of insect in the world than all the other kinds of animal put together. If an animal has damp slimy skin, and is born in water but lives much of its life on land, it's an amphibian. Baby amphibians hatch out of jelly-like eggs. If an animal has a dry scaly skin and is born on land, it's a reptile. Most reptiles lay eggs with leathery skins If an animal lives in water, breathing through gills and using fins to move, it's a fish. Most fish lay jelly-like eggs which hatch into baby fish.

鲨鱼和海豚有什么不同？ 虽然鲨鱼和海豚看起来很像，但它们属于两个非常不同的动物群体。 鲨鱼是一种鱼，但海豚是另一种哺乳动物的成员。 你看起来一点也不像海豚。 但你是哺乳动物。太!如果一种动物把空气吸入肺部，它的孩子吃妈妈的奶，那它就是哺乳动物。 大多数哺乳动物的身上都有皮毛或毛发。 如果一种动物长着羽毛，从硬壳蛋中孵化出来，那它就是鸟。 所有的鸟都有翅膀，而且大多数都能飞。 如果一种动物有六条腿，身体有三个部分，那它就是昆虫。 世界上昆虫的种类比所有其他动物的种类加起来还要多。 如果一种动物有潮湿粘稠的皮肤，出生在水中，但大部分时间生活在陆地上，那么它就是两栖动物。 小两栖动物从果冻状的卵中孵化出来。 如果一种动物有干燥的鳞状皮肤，并且出生在陆地上，那么它就是爬行动物。 如果一种动物生活在水里，通过鳃呼吸，用鳍移动，那它就是鱼。 大多数鱼产果冻状的卵，然后孵化成小鱼。

What's the difference between... frogs and toads? Frogs usually have smooth skin, and long legs for leaping. Most toads have lumpy skin and move their short thick bodies about by crawling. and alligators and crocodiles? Crocodiles have longer, more pointed snouts than alligators. A crocodile also has one very large tooth sticking up on each side when it closes its mouth. and monkeys and apes? The big difference between these animals is that monkeys have long tails, but apes don't have tails at all. There are lots of different kinds of monkey, but the only apes are gorillas, orang-utans, chimpanzees, gibbons and humans. and rabbits and hares? Hares have longer legs and ears than rabbits. Their whiskers are longer, too. Frogs and toads are both amphibians. Alligators and crocodiles are both reptiles. Monkeys and apes are mammals. A woodlouse looks like an insect, but it isn't it has too many legs! This creepy- crawly is related to crabs and lobsters. Rabbits and hares are both mammals.

两者的区别是什么？ 青蛙和蟾蜍？青蛙通常有光滑的皮肤和适于跳跃的长腿。 大多数蟾蜍的皮肤凹凸不平，通过爬行来移动它们又短又粗的身体。 短吻鳄和鳄鱼呢？ 鳄鱼的鼻子比短吻鳄更长、更尖。 鳄鱼闭上嘴巴的时候，两边各有一颗很大的牙齿。 猴子和猿呢？这些动物之间最大的区别是猴子有长尾巴，而猿根本没有尾巴。 有很多不同种类的猴子，但只有大猩猩、猩猩、黑猩猩、长臂猿和人类。 还有兔子和野兔？野兔的腿和耳朵比兔子长。 它们的胡须也更长。 青蛙和蟾蜍都是两栖动物。 短吻鳄和鳄鱼都是爬行动物。 猴子和猿是哺乳动物。 木虱看起来像昆虫，但它不是，它有很多腿！这种令人毛骨悚然的小爬虫与螃蟹和龙虾有亲缘关系。 兔子和野兔都是哺乳动物。

Why do animals have skeletons inside their bodies? Not all animals have skeletons, but most large ones do. This is because the bigger an animal is, the more it needs a strong, sturdy framework to hold its body together and carry its weight. Skeletons also protect soft inside parts, like brains and hearts. Which animals have skeletons on the outside? Most smaller animals have tough skins called exoskeletons. These outside skeletons do the same job as inside ones. They protect and support animals' soft bodies. Animals without backbones are called invertebrates. Insects, spiders, snails, worms, jellyfish, prawns and crabs are all invertebrates. Animals with backbones are called vertebrates. Fish are vertebrates, and so are amphibians, reptiles, birds and mammals. Most animals' skeletons are made of bone, but a shark's skeleton is made of gristle. This isn't as hard as bone, but it's still tough. You have some on the tip of your nose. Insects, spiders, scorpions, centipedes and millipedes all have tough exoskeletons. Lobsters, crabs and some beetles have really tough exoskeletons that work like armour, to protect them from attack. Colossal squid are the biggest kind of invertebrate. The longest one ever found measured more than 18 metres from its head to the tip of its tentacles longer than eight scuba divers! To grow larger, an animal has to break out of its old exoskeleton and grow a new one,

为什么动物的身体里有骨骼？ 不是所有的动物都有骨骼，但大多数大型动物都有。 这是因为动物越大，它就越需要一个强壮的框架来支撑它的身体并承受它的重量。 骨骼还能保护柔软的内部部位，比如大脑和心脏。 哪些动物的外面有骨骼？ 大多数较小的动物都有坚硬的外骨骼。 这些外部骨骼和内部骨骼的功能是一样的。 它们保护和支撑着动物柔软的身体。 没有脊椎的动物叫做无脊椎动物。 昆虫、蜘蛛、蜗牛、蠕虫、水母、对虾和螃蟹都是无脊椎动物。 有脊骨的动物叫做脊椎动物。 鱼是脊椎动物，两栖动物、爬行动物、鸟类和哺乳动物也是。 大多数动物的骨骼都是由骨头构成的，但鲨鱼的骨骼是由软骨构成的。 虽然没有骨头那么硬，但还是很硬。 你的鼻尖上有一些。 昆虫、蜘蛛、蝎子、蜈蚣和千足虫都有坚硬的外骨骼。 龙虾、螃蟹和一些甲虫有非常坚硬的外骨骼，就像盔甲一样，保护它们免受攻击。 大王乌贼是最大的无脊椎动物。 迄今为止发现的最长的一条从头部到触须超过18米，它的触须比8个戴水肺的潜水员还长！为了长得更大，动物必须跳出旧的外骨骼，长出新的外骨骼，

Why do camels have humps? A camel's hump is its own built-in food cupboard. By living off the fat stored in its hump, a camel can go for as long as two weeks without eating. Camels need their humps because they live in deserts, where food and water are hard to find. Why do elephants have trunks? An elephant's trunk is a helpful tool. It can be used to pull down leaves and branches to eat. It also makes a good hose—elephants can squirt dust or water over themselves to keep cool. Why do giraffes have long necks? A giraffe's long neck makes it tall enough to eat the leaves at the tops of trees. Other animals cannot reach as high, so the giraffe has lots to eat. Elephants say 'hello' to friends by shaking trunks with them. An elephant's trunk is a bit like a hand. Using its tip, an elephant can pick up something as small as a button. An Arabian camel has one hump. A thirsty camel can drink ten buckets of water in just ten minutes! A Bactrian camel has two humps. A giraffe's tongue is half a metre long!

为什么骆驼有驼峰？骆驼的驼峰是它自己内置的食物柜。 依靠储存在驼峰里的脂肪，骆驼可以长达两周不吃东西。 骆驼需要驼峰，因为它们生活在沙漠中，那里很难找到食物和水。 大象为什么有象鼻？ 大象的鼻子是一个有用的工具。 它可以用来拉下树叶和树枝来吃。 这也是一种很好的软管——大象可以把灰尘或水喷到自己身上来保持凉爽。 为什么长颈鹿有长脖子？ 长颈鹿的长脖子使它足够高，可以吃到树顶的叶子。 其他动物够不到这么高，所以长颈鹿有很多吃的。 大象通过摇动象鼻向朋友打招呼。 大象的鼻子有点像手。 大象可以用它的尖端捡起像纽扣一样小的东西。 阿拉伯骆驼只有一个驼峰。 一只口渴的骆驼可以在十分钟内喝掉十桶水！双峰驼有两个驼峰。 长颈鹿的舌头有半米长！

Which bird has eyes in the back of its head? An owl's eyes aren't really in the back of its head, but at times they might as well be! Owls have such bendy necks that when they want to look backwards they swivel their heads right round! How do bats see in the dark? Bats not only speed about at night without bumping into things, they also manage to hunt down juicy insects to eat. Bats can do this even when it's pitch dark, because they use sound, not light, to find their way. Which animals smell with their tongues? Snakes and lizards don't smell with their noses like we do. Instead, they flick their long tongues in and out. Their tongues pick up smells from the air and the ground, helping them to track down things to eat. An owl's huge eyes help it to see at night. This is when most owls fly about hunting for food. Bats make lots of very high squeaking sounds as they fly about. When these sounds hit objects like insects or trees—they bounce off them, back towards the bats. The repeated sounds are called echoes. And bats can tell where things are by listening to the echoes. Starfish don't have heads, but they do have eyes. They are on the ends of their arms. The blue-tongued skink sticks out its big blue tongue to frighten enemies away. African elephants have ears as big as bedspreads the biggest ears in the world. Elephants have very good hearing, but their ears are also useful for keeping cool. They can be flapped like fans, for example.

哪种鸟的眼睛长在后脑勺上？ 猫头鹰的眼睛并不是真的长在后脑勺上，但有时它们也可能长在后脑勺上！猫头鹰的脖子很弯曲，当它们想回头看的时候，它们会把头转过来！蝙蝠在黑暗中怎么看东西？ 蝙蝠不仅在夜间疾速而不撞到东西，它们还设法捕捉多汁的昆虫来吃。 蝙蝠即使在漆黑的环境中也能做到这一点，因为它们是用声音而不是光来找路的。 哪种动物用舌头闻气味？ 蛇和蜥蜴不像我们用鼻子闻气味。 相反，它们把长舌头弹进弹出。 它们的舌头能吸收空气和地面的气味，帮助它们找到可以吃的东西。 猫头鹰的大眼睛帮助它在晚上看东西。 这是大多数猫头鹰飞来飞去寻找食物的时候。 蝙蝠飞来飞去时会发出很多很高的吱吱声。 当这些声音击中昆虫或树木等物体时，它们会被反射回来，回到蝙蝠那里。 重复的声音被称为回声。 蝙蝠可以通过听回声来判断物体的位置。 海星没有头，但它们有眼睛。 他们是在他们的手臂末端。 蓝舌龙伸出它蓝色的大舌头吓跑敌人。 非洲象的耳朵有床单那么大是世界上最大的耳朵。 大象的听力很好，但它们的耳朵也有助于保持凉爽。 例如，它们可以像扇子一样被拍打。