12的英文怎么写岀来

　　Some firms expect the guards to work twelve hours a day.

　　有些公司要求保安每天工作12小时。

　　Her own twelve pictures sold fairly well, mostly to friends and family.

　　她自己的12幅画卖得相当好，多半卖给了朋友和家人。

　　A twelve hour night time curfew is in force.

　　正在执行12小时的宵禁。

　　The building will house twelve boys and eight girls.

　　这座房子里会住12个男孩和8个女孩。