原因
cause;grounds;reason
別問什么～。Don’t ask why./產(chǎn)生這種情況有兩方面的～。Two things account for the occurrence./出于某種～for some reason;out of certain reason/由于上述～ for the above reason/由于這個～on this account/追究～find out the reason (or cause)/～和結(jié)果（因果）cause and effect/主要～main (or principal) reason;basic cause