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吴教授是一位非常讨人喜欢的人,他老是笑脸迎人,也很少讲令人不太愉快的话。可是我注意到他最近有时忽然会有一种不舒服的表情,只是这种表情很快地就消失了。我直截了当地问吴教授是怎
Professor Wu is a very lovable person who always smiles on his face and seldom makes unpleasant words. However, I noticed that he sometimes had an uncomfortable expression in the recent past, only that expression soon disappeared. I asked Professor Wu straightforward how