Definition: the number 1,000,000,000 Level: B2
化妆品是一个价值十亿美元的行业。
Cosmetics is a ___billion dollar industry.
她脑子里有无数想法。
She had ___billions of thoughts in her head.
这个国家的人口超过十亿。
The population of the country is over one ___billion.
