某些證據(jù)表明“快速眼動睡眠”可能是大腦長期適應(yīng)生活經(jīng)驗(yàn)形成的。 Some evidence suggests that Rapid Eye Movement Sleep may be a time when the brain adapts to life experiences.
快速巡邏艇迅即趕上那艘舊貨船。 The fast cruiser soon overhauled the old cargo boat.
如果我們想準(zhǔn)時到達(dá)那里,我們最好加快速度。 We'd better speed up if we want to get there in time.
問題是世界人口正在快速增長。 The problem is the world population is growing fast.