Unit 5

UNIT 5 WORD LIST aquatic If a plant or animal is aquatic, it lives or grows in water. The dolphin is an aquatic mammal. biosphere The biosphere is the Earth's surface and atmosphere where there are living things. Birds, trees, and worms all thrive in the biosphere. bizarre When something is bizarre, it is very strange. My bizarre dreams make no sense to me when I am awake. Celsius Celsius is a scale for measuring temperature. Water freezes at zero degrees Celsius. coarse If something is coarse, that means it has a rough texture. The coarse sweater made my skin itch. companion A companion is a person that someone spends a lot of time with. I always walk to school with my companion frank. digest To digest means to swallow food and pass it through the body. Allow some time for food to be digested before going swimming. duration The duration of an event is the time during which it happens. The girls watched television for the duration of the evening. ecology Ecology is the study of the environment and living things. We study ecology to learn how to help improve the Earth. feat A feat is an impressive or difficult achievement or action. The elephant's standing up on one leg was a feat.

水生的如果一种植物或动物是水生的，它在水中生活或生长。 海豚是一种水生哺乳动物。 生物圈是地球表面和大气中有生物的地方。 鸟类、树木和蠕虫都在生物圈中茁壮成长。 当某事很奇怪的时候，它是非常奇怪的。 当我醒着的时候，我的奇怪的梦对我来说毫无意义。 摄氏是测量温度的刻度。 水在摄氏零度结冰。 如果某物很粗糙，那意味着它有粗糙的质地。 那件粗毛衣使我皮肤发痒。 伴侣是一个人花很多时间在一起的人。 我总是和我的同伴弗兰克一起步行去学校。 消化意味着吞下食物并使其通过身体。 游泳前给食物一些时间消化。 duration事件的持续时间是指事件发生的时间。 女孩们整个晚上都在看电视。 生态学是对环境和生物的研究。 我们学习生态学是为了学习如何帮助改善地球。 feat是指令人印象深刻的或困难的成就或行动。 大象单腿站立是一项壮举。

infinite If something is infinite, it has no limit or end. Many scientists believe that the universe is infinite. nucleus The nucleus is the central part of an atom or cell. The nucleus is made up of many tiny particles. parasite A parasite is a tiny animal or plant that attaches to another animal to get food. The sick dog was covered in parasites. prominent When something is prominent, it is important and well known. Queen Victoria was a prominent person in history. repetitive When something is repetitive, it is repeated many times and becomes boring. Working on an assembly line making cars every day is a repetitive job. reproductive If something is reproductive, it is a living thing which can produce young. The reproductive system of a plant is simple. temperate When a place is temperate, it never gets too hot or cold. In Peru, the weather is temperate and rarely gets too hot or cold. tolerance Tolerance is the ability to accept something unfavorable or to allow the freedom of choice for others. Boxers have a high tolerance for pain. undergo To undergo an action means to have it happen to you. The cancer patient undergoes treatments twice a week. vulnerable When someone is vulnerable, they are weak and without protection. He felt very vulnerable when he was stranded in the desert.

如果某物是无限的，它没有极限或终点。 许多科学家相信宇宙是无限的。 细胞核是原子或细胞的中心部分。 原子核是由许多微小的粒子组成的。 寄生虫是一种附着在另一种动物身上以获取食物的微小动物或植物。 那只病狗身上长满了寄生虫。 当某事很突出时，它是重要的和众所周知的。 维多利亚女王是历史上的一位杰出人物。 当某事是重复性的，它被重复了很多次，变得无聊。 每天在装配线上生产汽车是一项重复的工作。 reproductive adj .繁殖的如果某物是可繁殖的，它是一种能生育后代的生物。 植物的生殖系统很简单。 当一个地方是温和的，它永远不会太热或太冷。 秘鲁的气候温和，很少太热或太冷。 宽容是一种接受不利事物或允许他人自由选择的能力。 拳击手对疼痛有很高的忍耐力。 经历一个动作意味着让它发生在你身上。 那个癌症病人每星期接受两次治疗。 当某人脆弱时，他们很脆弱，没有保护。 当他被困在沙漠中时，他感到非常脆弱。

Small World Even though people can't see me, I'm an important part of Earth's biosphere. Scientists who study ecology know that I was the first life form on Earth. There are more of my kind than any other plant or animal in the world. Without me, other plants and animals would not even exist. I am a protist, and my tiny body is made up of one single cell. In my small world, things can be absolutely bizarre. Unlike most aquatic plants and animals, I don't need a temperate climate. I have a very high tolerance for extreme conditions. Right now, I'm swimming around in a bucket of boiling water! The temperature is 150 degrees Celsius, but I feel comfortable. I have coarse hairs called cilia that help me swim around in here. I move my cilia in a repetitive motion for the duration of my swim. I cannot go very fast, though. It takes me about five minutes to swim a distance of just one millimeter! When I get hungry, I look for tiny, vulnerable parasites. I swim up to one and swallow it whole. I digest things much like people do. I have an organ that works just like a human stomach. After I eat, I release nitrogen gas. Nitrogen is a prominent gas in the Earth's atmosphere. Other plants and animals need my nitrogen to survive. My reproductive ability is my most unique trait. I don't need a companion to mate with. Instead, I undergo a process called fission, where my own nucleus splits in half. An exact copy of my nucleus is made, which forms into another protest. It really is an impressive feat. I can create an infinite number of new protests all by myself!

虽然人们看不见我，但我是地球生物圈的重要组成部分。 研究生态学的科学家都知道我是地球上最早的生命形式。 我的同类比世界上任何其他植物或动物都多。 没有我，其他植物和动物甚至不会存在。 我是一个原生生物，我小小的身体是由一个细胞组成的。 在我的小世界里，事情可以非常离奇。 不像大多数水生动植物，我不需要温带气候。 我对极端环境有很高的忍耐力。 现在，我正在一桶沸水里游泳！温度是150摄氏度，但我觉得很舒服。 我有一种叫纤毛的粗毛，可以帮助我在这里游泳。 在我游泳的过程中，我不断地移动我的纤毛。 但是我不能走得很快。 我花了大约五分钟游出一毫米的距离！当我饿的时候，我会寻找微小的，脆弱的寄生虫。 我游到一条鱼跟前，把它整个吞下去。 我和人一样消化东西。 我有一个像人的胃一样工作的器官。 吃完后，我释放出氮气。 氮是地球大气中的一种重要气体。 其他动植物需要我的氮才能生存。 繁殖能力是我最独特的特点。 我不需要伴侣来交配。 相反，我经历了一个叫做裂变的过程，我自己的原子核分裂成两半。 我的细胞核被复制了一模一样，形成了另一个抗议体。 这确实是一个令人印象深刻的壮举。 我可以自己创造无数个新的抗议！