involved参与expenditure经费dare挑战expertise专门nut螺母dignity尊严scent香味premier首要的attach重视petrol汽油domination统治comrade朋友regulator监管机构fragmenttary碎片aeroplane飞机sock猛击recreation玉律dile游手好闲的grievous极度impulse冲动idiomatic表达方式地道的veteran老手tireless不咋疲惫的bystander旁观者corps兵团congress代表大会
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