I have three pieces of luggage

三件───Three;行李───luggage

This train ticket is valid for three days.───这张车票3日内有效.

He went from rags to riches in only three years.───他仅用了三年就从赤贫变成了巨富.

He downed his opponent with three blows.───他三拳击倒了对手.

He hit a bad patch this year, having two operations in three months.───今年他可倒霉了, 3个月内开了两次刀.

This medicine is to be taken in three separate doses every day.───这药每天分三次吃.

Matter exists in three states: solid, liquid and gas.───物质以三种形态存在: 固态 、 液态和气态.

Through his lack of attention to the game he had put his white stone into a " tiger's mouth " formed by three black stones.───由于他漫不经心地下棋,他的白子掷到黑子的 虎口 里去了.

We can sum up the main point of the lesson in three sentences.───我们可以用三句话来概括本课要点.