Lan: Hi, Dad. 

Mr Tan: Lan, what are you doing? It’s pretty late now. 

Lan: I’m doing a project on energy sources. But I don’t quite understand what energy is. 

Mr Tan: Well, it’s power that we use to provide us with light, heat or electricity. 

Lan: Oh. Where does it come from? 

Mr Tan: It comes from many different sources like coal, oil, natural gas,... We call them non-renewable sources. 

Lan: Can it come from the sun, wind or water too? 

Mr Tan: Yes, it can. We call those types of energy renewable sources because we cannot run out of them. Renewable means we can easily replace them. 

Lan: I get it now. 

Mr Tan: You know, some types of energy are cheap and easy to use, but others are more expensive and harder to find... 
Liệt kê từ vựng những từ bình thường 0 cần dễ có giải nghĩa và thể loại nha=))