劍橋詞典a substance of no value or use that is made during a process in which something useful is produced 無用的副產(chǎn)品；工業(yè)垃圾 Cadmium is a toxic waste product of the electronics industry . 鎘是電子工業(yè)產(chǎn)生的一種有毒廢物。 返回 waste product