12的单词怎么写

　　There were twelve of us in all for dinner.

　　我们一共十二人吃饭。

　　She often puts in twelve hours' work a day.

　　她时常每天工作十二个小时。

　　Twelve hours later she was all smiles again.

　　十二小时之后，她又喜笑颜开了。