[ti:UNIT 2 Plant a Plant! Lesson 13: Why Are Plants Important?]
[0:00.680]UNIT 2 第二单元
[0:02.359]Plant a Plant! 培育植物
[0:04.357]Lesson 13: 第13课：
[0:06.716]Why Are Plants Important? 为什么植物很重要？
[0:09.689]THINK ABOUT IT! 想一想
[0:11.229]·Are there a lot of trees where you live? 你生活的地方有许多树吗？
[0:14.210]Why or why not? 为什么？
[0:16.198]·Why do we need trees? 为什么说我们需要树木？
[0:18.583]·What kinds of things can plants do? 植物可以做哪些事情呢？
[0:21.576]We Need Trees! 我们需要树木！
[0:24.003]Let's talk about trees and the reason why we need them. 我们来说说树木，以及为什么我们需要他们。
[0:27.959]Trees help clean the air. 树木有助于净化空气。
[0:30.122]It's pleasant to walk among the trees. 走在树丛中令人很愉快。
[0:32.971]They also give us food -- like apples, bananas and oranges. 它们给我们提供食物——像苹果，香蕉和桔子。
[0:38.193]How about donuts? 油炸圈饼呢？
[0:39.987]I want to dig a hole and plant a donut tree! 我想种一棵油炸圈饼树！
[0:43.943]... mmm... donuts! 嗯……油炸圈饼！
[0:46.687]Donuts don't grow on trees! 油炸圈饼不长在树上！
[0:49.799]But we can make and build things with trees–like chairs, beds and houses! 但是我们用树木制做东西——像椅子，床和房子！
[0:57.026]Sometimes the weather is sunny and hot. 有时候天气很睛朗，很热。
[1:00.191]Then we can sit under a tree in the shade. 那时候我们可以坐在树荫下。
[1:03.356]We make books from trees. 我们用树木做书本。
[1:05.414]Also, many animals live in trees. 而且，很多动物生活在树林里。
[1:08.368]Do plants do other things? 植物还能干其它事情吗？
[1:10.636]Plants cover the soil. 植物覆盖和保护着土壤。
[1:12.799]Then the wind and water don't carry the soil away. 这样一来风和水就不会使土壤流失。
[1:16.914]All plants take energy from the sun and make it into food. 所有的植物都从太阳吸收能量，并将它转化为养分。
[1:21.029]People and other animals need the food to live. 人们和其它植物需要食物才能生存。
[1:24.299]Without food, they would have nothing to eat and they would die. 没有食物，他们没有东西吃，会死的。
[1:29.363]What is energy? 什么是能量？
[1:31.526]Light is energy. 光是能量。
[1:33.531]Heat is energy. 热是能量。
[1:35.852]I need food to live. 我需要食物才能生存。
[1:37.909]Dinosaurs need a lot of food! 恐龙需要大量的食物！
[1:40.916]They need a lot of donuts! 他们需要大量的油炸圈饼！
[1:43.818]FASCINATING FACTS 惊人的事实
[1:46.044]Some animals eat only one plant. 一些动物只吃一种植物。
[1:50.317]Pandas eat bamboo only. 熊猫只吃竹子。
[1:53.799]Big pandas eat eighteen kilograms of bamboo every day! 大熊猫每天吃十八公斤竹子！
[2:01.393]PROJECT 任务
[2:02.664]DO WE NEED PLANTS? 我们需要植物吗？
[2:04.753]Yes, we need plants. 是的，我们需要植物。
[2:06.677]Everyone knows that! 这是每个人都知道的！
[2:08.865]But why do we need them? 但是为什么呢？
[2:11.253]Find three answers to this question. 找出至少三条答案。
[2:14.454]Write down your answers. 写出你的答案。
[2:16.808]Talk about your answers with some of your classmates. 给你的同学讲一讲你的答案。
[2:20.755]Are their answers the same as yours? 他们的答案和你的一样吗？
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