Forms of Life

Mammals are covered by hair or fur, have a backbone and are warm-blooded.

ps:哺乳动物被毛发覆盖，有脊骨，是温血动物。

covered盖着一层; 盖满; 有顶的; 掩蔽; 遮盖; 盖; 覆盖; 撒上，洒上，溅上; cover的过去分词和过去式

hair毛发; 头发; 有…毛发的; 茸毛

fur软毛; 毛皮; 人造毛皮; 用毛皮覆盖; 除去水垢

have有; 持有; 占有; 由…组成; 显示出，带有; 与过去分词连用构成完成时

backbone脊梁骨; 脊柱; 支柱; 骨干; 基础; 毅力; 骨气

warm-blooded温血的; 恒温的

All female mammals produce milk for their young.

Reptiles are covered by scales and include snakes, lizards and turtles.

ps:爬行动物被鳞片覆盖，包括蛇、蜥蜴和海龟。

covered盖着一层; 盖满; 有顶的; 掩蔽; 遮盖; 盖; 覆盖; 撒上，洒上，溅上; cover的过去分词和过去式

scales规模，范围，程度; 等级; 级别; 等级体系; 攀登; 到达…顶点; 去鳞; 刮除牙石; scale的第三人称单数和复数

snakes蛇; 曲折前行; 蛇行; 蜿蜒伸展; snake的第三人称单数和复数

lizards蜥蜴; lizard的复数

turtles海龟; 龟; 陆龟; 水龟; 鳖; turtle的第三人称单数和复数

Reptiles have a backbone and are cold-blooded, which means they often rely on external sources of heat.

ps:爬行动物有脊梁，是冷血动物，这意味着它们通常依赖外部热源。

backbone脊梁骨; 脊柱; 支柱; 骨干; 基础; 毅力; 骨气

cold-blooded冷酷的; 无情的; 残酷的; 冷血的

often时常; 常常; 往往; 大多

rely on依靠; 信赖

external外部的; 外面的; 外界的; 外来的; 在外的; 来自以外的; 外部; 外面; 外观; 外部情况

sources来源; 出处; 信息来源; 原始资料; 起源; 根源; 原因; 获得; source的第三人称单数和复数

heat热; 温度; 炎热天气; 高温，热的环境; 加热; 变热; 变暖

Birds are covered by feathers and are warm-blooded.

Most birds can fly and many types of birds migrate great distances. 

Most insects such as ants and bees have a small, 3-part body with 3-pairs of legs.

Some insects, like mosquitoes, spread diseases that cause the deaths of many humans.

Unlike animals, plants get the energy that they need from the sun. 

Plants convert light energy, along with carbon-dioxide and water, into chemical energy.

ps:植物将光能、二氧化碳和水转化为化学能。

Plants植物; 发电厂; 工厂; 大型机器，设备; 栽种; 种植; 播种; 在栽种; 立稳; 竖立; 安放; plant的第三人称单数和复数

convert转变，转换，转化; 可转变为; 可变换成; 改变; 皈依，归附; 改变宗教的人; 皈依者

along with除某物以外; 随同…一起，跟…一起

water水; 大片的水; 水域; 江，河，湖，海; 给…浇水; 灌溉; 充满眼泪; 流口水

into到…里面; 进入; 朝; 向; 对着; 撞上; 碰上

chemical energy化学能

Exercises:

1.what type of animal covered by hair or fur?

Mammals

2.what type of animals covered by scales?

Reptiles .

3.some animals of this type can fly great distance.

birds

4.what type of animals are ants and bees?

insects

5.what type of life produce its own food?

Plants 

6.what covers the bodies of mammals?

hair or fur

7.Most insects such as ants and bees have a small, 3-part body with 3-pairs of legs.

8.Unlike animals, plants get the energy that they need from the sun. 

9.most mammals live on land , but some live in the sea.

10.mammals include some of the most intelligent animals on earth, such as elephants and human beings.

11.All female mammals produce milk for their young.