back troughback-trough背: body's back槽: trough; manger铣背槽: milling back flutes背侧: dorsal part; dorsum; the dorsal side背舱: piggyback pod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:背槽，即可在微信中查询翻译
