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(shù)。

　　He finally won his freedom after twenty years in jail.

　　他蹲了二十年監(jiān)獄以后終于獲得了自由。

　　They met again after a gap of twenty years.

　　他們闊別二十年后又見面了。

　　So that's twenty of each sort, right?

　　那么，每一種都是二十個，對不對？