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

In modern times we humans face changing conditions.For humans to live, w...

Scales and rulers are used to measure weight and length.秤和尺用来测量重量和长度。 Un...

There are many forms of life on Earth, including human beings.Life exist...

Thank you for calling our customer support. 感谢您致电我们的客户服务部 Please listen ...

Hey look at that. Look at what? Look out the window. Do you see the youn...

Here are 6 of the Earth's 7 continents: /'kɒntɪnənts/Asia is the larges...

This man goes running 5 days a week if the weather is good.On the weeken...

Most of the Earth's water is in the oceans.The two largest oceans are th...