... be disappointed with sb./sth.对……失望 be doing when正要做某事时，突然…… be doing表达某种语气、感情，如喜爱、赞美、厌恶、痛恨、批判等 ...
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on the point of doing sth
... Make a point of doing sth认为做某事重要或有必要 On the point of doing sth正要做某事时 There is no point in wasting time.(耗时间没用) ...
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