one 用作替代词主要用于替代“a+单数可数名词”,表泛指;若需特指,则用 the one.如:A fast train is one that goes fast. 快车是一种行驶快的火车.The accident was similar to one that happened in 2008. 这个事故与发生在2008年的事故类似.Open the drawer on the left, the one with a key in it. 打开左边的蚂皮抽屉,上面有钥匙的那个.Here are six rings. Pick out the one you like best. 这里有六枚戒指,选出你最喜欢的一枚.I want very much to see these films, especially the one you mentioned. 我很想看这些闷高差电影,特别是你提到的那一部.注:the one与that均可表特指,但前者只用于替代念悉单数可数名词,而后者则可用于替代可数或不可数名词. Here are six rings. Pick out the one you like best. 这里有六枚戒指,选出你最喜欢的一枚.
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