num.第二十四

Time is sometimes called the fourth dimension. 時間有時被稱為第四度空間。

It take twenty minutes for us to go there by bike. 我們騎自行車到那里要花20分鐘。

He looks to be a young man of twenty. 他看起來就像一個20歲的青年。

He has been in practice for twenty years. 他已有20年的實踐經(jīng)驗。

He's been in tin-pan alley for twenty years. 他二十年來一直演奏流行樂曲。