数量词“一度”表示一次或一阵,经常和时段成分“一年”连用,但类推性差,在对外汉语教学中宜作为一个固定格式来教学。单独使用的“一度”表示“一次”时,可以作补语、状语;表示“一阵”多位于“有”后。二者的差异可以从来源得到解释。 The quantifier “once ” means one or a few times, often used in conjunction with the time segment “one year ”, but the analogy is poor and should be used as a fixed format in teaching Chinese as a foreign language. Used alone, “once” means “once ”, can be used as a complement, adverbial; said “a while ” after more than “there ”. The difference between the two can be explained from the source.