back drainage背面: the back; the reverse side; ...排水: drain off water; drain away ...地面排水;路面排水: surface drainage表面排水: surface drainage地表面排水: surface drainage下载手机词典可随时随地查词查翻译关注微信公众号:chachacidian,回复:背面排水,即可在微信中查询翻译