occasional a.偶然的,临时的偶然的,特殊...occasional parasite 偶然寄生物...occasional offender 偶犯...occasional regeneration 偶然再生...occasional cause 偶因...occasional host 偶然宿主...occasional trade 临时交易,临时商业...occasional dearler's licence 临时商贩执照...occasional income 临时收益(所得)...
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