是英文，常指“一旦，曾经”。1、一次我只去过那里一次。 He cleans his car once a week.他每周洗一次汽车。 She only sees her parents once every six months.她每半年才探望一次父母。 2 、曾；曾经I once met your mother.我曾经见过你母亲。 He once lived in Zambia.他曾在赞比亚生活过。 This book was famous once, but nobody reads...
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