billion/'bɪljən $ -ljən/

num. a thousand million

num. 十亿：They have spent two billion dollars on this. 他们在这上面已经花费了20亿美元。

billions of sb/sth 数十亿的…；无数的…：There are billions of stars in the sky. 天空中有数十亿颗星星。

音组-illion/-'ɪljən/

billion; million

常犯错误

✗ five billions dollars

✓ five billion dollars 50亿美元

[✌只有表示概数时才用复数形式billions]