down hang drain是什么水沟?RC drain W/H.D.G.S hinged grating是什么水沟?RC 是钢筋混凝土HD是heavy duty

down hang drain是什么水沟?RC drain W/H.D.G.S hinged grating是什么水沟?RC 是钢筋混凝土HD是heavy duty Down The Drain 歌词 going down the drain Down The Drain (Again) 歌词 Hang down your go down the drain如何翻译? go down the drain的意思是? drain they hang upside down from a disappeared down a drain,down 放在这里什么含义?down做什么词性？我觉得是介词，disappeared under the drain。和under的关系差不多 hang的过去式是什么? hang的过去式是什么? hang是什么姓 分析句型：A single mistake and all that time and money would go down the drain. 英语翻译some food-processing plants may literally wash profits down the drain. hang悬挂是什么词性词语 hang hang