短语词组短語built -on n pump 與發動機制成一躰的泵Built -on motors for oil burners 燃油器用法蘭式電機house built on stilts 吊腳樓built on sand 建立在不牢靠的基礎上的;不切實際are built on communication 建立在溝通之上 返回 built on