There were twenty or so people there.
那儿有差不多二十个人。
Pick a number from one to twenty.
从一至二十中挑选一个数。
He finally won his freedom after twenty years in jail.
他蹲了二十年监狱以后终于获得了自由。
They met again after a gap of twenty years.
他们阔别二十年后又见面了。
So that's twenty of each sort, right?
那么，每一种都是二十个，对不对？