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初中英语河北加拿大版学生用书13

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[00:00.00]人人听力网 Lesson 13:
[00:04.10]Why Are Plants Important? Why Do We Need Trees
[00:11.26]JENNY:Let's talk about trees and why we need them.
[00:17.92]Trees help clean the air.
[00:22.07]They give us food--like apples,bananas and oranges.
[00:28.73]DANNY:How about donuts?I want to plant a donut tree...mmm...donuts!
[00:38.69]BRIAN:Donuts don't grow on trees!
[00:42.45]But we can make and build things with trees--like chairs,beds and houses!
[00:50.18]DANNY:Sometimes the weather is sunny and hot.
[00:55.82]Then we can sit under a tree in the shade.
[01:01.28]JENNY:We make books from trees.Also,many animals live in trees.
[01:08.83]DANNY:Do plants do other things?
[01:12.91]BRIAN:Plants cover the soil.
[01:16.75]The the wind and water don't carry the soil away.
[01:22.31]JENNY:All plants take energy from the sun and make it into food.
[01:29.26]People and other animals need the food to live.
[01:35.03]DANNY:I need food to live.
[01:38.80]Dinosaurs need a lot of food
[01:43.76]They need a lot of donuts!
[01:48.02]Food for Everything
[01:51.67]All living things need food for energy
[01:57.03]Plants and animals are living things.
[02:02.07]Without a way to get energy,they would die.
[02:07.53]Plants and animals get their food in different ways.
[02:13.30]A plant uses the energy in sunlight to make food for itself.
[02:20.56]Some animals eat plants.
[02:24.33]Some animals eat other animals.These animals are predators.
[02:31.69]What is energy? Light is energy. Heat is energy.Oh,no!
[02:39.87]What's "heat"? "Heat" and "hot"go together.Hot things have heat.
[02:49.12]Now do you know what "energy" is?
[02:53.09]Are plants important to all animals?
[02:57.95]Some animals don't eat plants,but plants feed all animals!
[03:05.50]How?Think of a tiger. The tiger eats animals that eat plants.
[03:14.17]Without plants,the tiger would have nothing to eat.
[03:20.41]A one-plant animal? Some animals eat only one plant.Pandas eat bamboo.
[03:30.57]Do they eat fruit? No.Do they eat grass? No!Only bamboo.
[03:39.72]Big pandas eat eighteen kilograms of bamboo every day!
[03:47.47]What does "kilogram"mean?It's in the dictionary!
[03:54.42]Look it up!

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