The plural form is billion after a number, or after a word or expression referring to a number, such as ‘several’ or ‘a few’. 用在数字或 several,a few 等表示数字的词语之后时,其复数形式为 billion。
										- NUM 十亿
 A billion is a thousand million.- ...3 billion dollars...
 30亿美元
- This year, almost a billion birds will be processed in the region.
 今年将会有近10亿只禽类在这个地区加工。
 
- QUANT-PLURAL 大量;无数
 If you talk about billions of people or things, you mean that there is a very large number of them but you do not know or do not want to say exactly how many.- Biological systems have been doing this for billions of years...
 生物系统亿万年来一直都是这样。
- He urged US executives to invest billions of dollars in his country.
 他力劝美国公司的高管们向他的国家投资数十亿美元。
- You can also use billions as a pronoun.
 
- He thought that it must be worth billions.
 他以为那一定价值连城。