be an aid to〔及物动词〕有助于详细»
有助于made a contribution to;were an aid to详细»
有助于made a contribution to wards详细»
有助于administer to;an aid to;be an aid to;be conducive to;be helpful to;be instrumental in;be of great assistance in;be of service to;conduce to;conduce towards;conduced to;conductive to;contribute to;contribute to wards;made for详细»