6 Under the sea

World Books Learning Ladders Under the Sea

世界书籍学习海底阶梯

Dolphin and whale Dolphins and whales are similar animals that live in the ocean. They are mammals, not fish. They feed their young with milk produced by the mother. They also swim up to the surface to breathe, then dive below with a splash. Smooth, rubbery skin helps a blue whale glide through the water. To swim, a whale flips its powerful tail up and down. A baby whale swims close to its mother for safety. It's a fact! A newborn blue whale weighs as much as a grown elephant. A grown blue whale is as long as a row of five elephants!

海豚和鲸鱼是生活在海洋中的类似动物。 它们是哺乳动物，不是鱼。 它们用母亲产的奶喂养幼崽。 它们也会游到水面呼吸，然后溅起水花潜入水下。 光滑的橡胶皮肤帮助蓝鲸在水中滑行。 为了游泳，鲸鱼会上下摆动它有力的尾巴。 为了安全，小鲸鱼游向母亲。 这是事实!一头新生蓝鲸和一头成年大象一样重。 一头成年蓝鲸有五头大象那么长!

A whale breathes by sucking in air through one or two blowholes on top of its head. Small, crusty shellfish, called barnacles, live on a whale's back. When a whale breathes out, a spout of misty spray shoots high into the sky. A blue whale has a giant mouth but eats only the tiniest animals in the sea. Dolphins often play together. They swim in groups and make clicking sounds.

鲸鱼通过头顶上的一两个气孔吸入空气。 一种叫做藤壶的小而坚硬的贝类，生活在鲸鱼的背上。 当鲸鱼呼气时，一股雾蒙蒙的水柱直冲云霄。 蓝鲸有一张巨大的嘴，但只吃海洋中最小的动物。 海豚经常在一起玩耍。 它们成群结队地游泳，发出咔嗒声。

Sea turtle A sea turtle can live for as long as 100 years! It usually spends its time paddling underwater in warm, shallow seas. Every few years, a mother turtle swims to a sandy beach. She crawls up the shore and lays lots of eggs, which hatch into baby turtles. A sea turtle swims fast. It uses its long front flippers like oars, as if it is rowing through the water. At night, a mother turtle digs a hole to lay her eggs. She covers the eggs with sand, using her short back flippers. Huge front flippers are great in the water, but they make moving in sand much more difficult.

海龟海龟可以活到100岁!它通常在温暖的浅海中划水。 每隔几年，一只母海龟就会游到沙滩上。 她爬上海岸，下了很多蛋，孵化成小海龟。 海龟游得很快。它用长长的前鳍像桨一样，好像在水中划桨。 晚上，海龟妈妈会挖一个洞产卵。 她用沙子盖住蛋，用她短的后鳍。 巨大的前鳍在水中很好用，但它们使在沙滩上移动变得困难得多。

A thick, heavy shell protects the turtle's soft body underneath. Hard, bony scales cover the shell and make it strong. It is easy to munch tough seaweed with a sharp beak. It's a fact! As soon as baby turtles hatch, they climb out of their sandy hole and crawl to the sea. It is an adventure!

厚厚的甲壳保护着乌龟柔软的身体。 坚硬的骨鳞覆盖在壳上，使其坚固。 它很容易用锋利的嘴咀嚼坚韧的海藻。 这是事实!小海龟一孵出来，就从沙洞里爬出来，爬到海里去。 这是一次冒险!