After twelve days at sea, they sighted land.

　　在海上航行十二天后他們看到了陸地。

　　The President arrived, escorted by twelve soldiers.

　　總統在十二名衛(wèi)兵的護送下到達。

　　Twelve inmates have been killed during a riot at the prison.

　　十二名囚犯在該監(jiān)獄里的一次暴亂中喪生。

　　The inventory will be disposed of over the next twelve weeks.

　　在未來的十二個星期中將進行清倉處理。

　　Twelve minus seven leaves five.

　　十二減去七剩五。