undercurrent底: bottom; base下层流: undercurrent; underset下层海流;底流: undercurrent表面下层流: sub-surface current分级机的下层流: underflow of the classifier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:底流下层流,即可在微信中查询翻译