play upon 1. 演奏(乐器) play upon a drum 打鼓 2. 对…产生影响 A heavy diet of TV drama played upon his nerves (或 moods, feelings). 他电视剧看得太多以至于情绪不安。 3. 利用(感情、恐惧等) play upon people's superstitious beliefs 利用人们的迷信思想 The plan can be defeated if you play upon its weaknesses. 你如果利用这项计划的弱点就可使之失败。