first course下: below; down; under; undernea ...锉: file纹: lines; veins; grain锉纹: cut of file; cut off file粗锉纹: bastard cut; coarse cut; rasp cut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:下锉纹，即可在微信中查询翻译
