The old professor
comes to see us once a week.
那个老教授一周来看我们一次。
Tell us the story
once more.把那个故事再给我们讲一遍。
联想拓展
at once 立刻;马上
once again再一次;又一次(相当于once more)
all at once突然(相当于suddenly)
once upon a time很早以前;从前
once in a while偶尔;间或once/as soon as
once偏重于条件,而as soon as偏重于时间。
Once you see the
film, you’d never forget it(不宜用as soon as).
你一旦看了这部电影,你就永远不会忘记它。
As soon as he got
off the plane, we wanted to say hello to him(不宜用once).
他一下飞机,我们就想向他打招呼。
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