Twenty guests are enough, I would have thought.

　　我覺得二十位客人就夠了。

　　There were twenty or so people there.

　　那兒有差不多二十個人。

　　Pick a number from one to twenty.

　　從一至二十中挑選一個數。

　　The two events are separated in time by one hundred years.

　　這兩事件在時間上相隔一百年。

　　A career as an actor requires one hundred per cent commitment.

　　干演員這一行需要百分之百的投入。