UNIT 2 Plant a Plant!
第二單元 培育植物
Lesson 13: Why Are Plants Important?
第13課：為什么植物很重要？
THINK ABOUT IT! Are there a lot of trees where you live?
想一想,你生活的地方有許多樹嗎？
Why or why not? Why do we need trees?
為什么？ 為什么說我們需要樹木？
What kinds of things can plants do?
植物可以做哪些事情呢？
We Need Trees!
我們需要樹木！
Let's talk about trees and the reason why we need them.
我們來說說樹木，以及為什么我們需要他們。
Trees help clean the air.
樹木有助于凈化空氣。
It's pleasant to walk among the trees.
走在樹叢中令人很愉快。
They also give us food -- like apples, bananas and oranges.
它們給我們提供食物——像蘋果，香蕉和桔子。
How about donuts?
油炸圈餅呢？
I want to dig a hole and plant a donut tree!
我想種一棵油炸圈餅樹！
... mmm... donuts!
嗯……油炸圈餅！
Donuts don't grow on trees!
油炸圈餅不長在樹上！
But we can make and build things with trees–like chairs, beds and houses!
但是我們用樹木制做東西——像椅子，床和房子！
Sometimes the weather is sunny and hot.
有時候天氣很睛朗，很熱。
Then we can sit under a tree in the shade.
那時候我們可以坐在樹蔭下。
We make books from trees.
我們用樹木做書本。
Also, many animals live in trees.
而且，很多動物生活在樹林里。
Do plants do other things?
植物還能干其它事情嗎？
Plants cover the soil.
植物覆蓋和保護著土壤。
Then the wind and water don't carry the soil away.
這樣一來風和水就不會使土壤流失。
All plants take energy from the sun and make it into food.
所有的植物都從太陽吸收能量，并將它轉化為養分。
People and other animals need the food to live.
人們和其它植物需要食物才能生存。
Without food, they would have nothing to eat and they would die.
沒有食物，他們沒有東西吃，會死的。
What is energy?
什么是能量？
Light is energy. Heat is energy.
光是能量。 熱是能量。
I need food to live.
我需要食物才能生存。
Dinosaurs need a lot of food!
恐龍需要大量的食物！
They need a lot of donuts!
他們需要大量的油炸圈餅！
FASCINATING FACTS
驚人的事實
Some animals eat only one plant.
一些動物只吃一種植物。
Pandas eat bamboo only.
熊貓只吃竹子。
Big pandas eat eighteen kilograms of bamboo every day!
大熊貓每天吃十八公斤竹子！
PROJECT ,DO WE NEED PLANTS?
任務, 我們需要植物嗎？
Yes, we need plants.
是的，我們需要植物。
Everyone knows that!
這是每個人都知道的！
But why do we need them?
但是為什么呢？
Find three answers to this question.
找出至少三條答案。
Write down your answers.
寫出你的答案。
Talk about your answers with some of your classmates.
給你的同學講一講你的答案。
Are their answers the same as yours?
他們的答案和你的一樣嗎？