The surgeons have been working for twenty hous without letup.

那些外科医师一连工作了二十小时没有停止。

Today was his grandmother's birthday ,so he and his faminlies went to celebret it at his grandmother's hous .

今天是他奶奶的生日，他和他的爸爸妈妈来到了他奶奶的家给他奶奶过生日。

The bump stores great pressure. The machine tool can be operated with multi hous and gunstock.

帮浦蓄压大,母机可作多组胶管与枪体操作。