- at a time依次， 逐一， 每次;
- at a speed of以…的速度;
- at a low ebbadv.衰败;
- a wealth of大量的，丰富的;
- a waste of time浪费时间;
- a sense of belonging一种归属感
- a rope of一根绳子
- a myriad of无数的
- a meeting of minds相互理解，意见一致;
- a large number of很多;
- a good catch很好的捕捉
- a bowl of一碗
- catch a bus赶公共汽车;
- drive a car开车;开汽车;
- quite a bit of相当多（不可数）;
- go to a movie去看电影;
- give a leap飞跃飞跃
- have a swim游泳;
- have a look at看看， 看一眼;
- leave a lot to be desired还有很多需要做的地方
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