[] very strong and suitable for hard physical work or to be used all the time 耐用的;结实的;重型的◆heavy-duty trucks (= strong and large) 重型卡车◆For business use you need a heavy-duty word-processing program. 应用於商业用途的话,你需要一套功能强大的文字处理程序。OPPlight-duty ➡medium-duty