英语词汇“be hard at it”的翻译、意思、用法、释义-英汉双解词典-注文网

单词	be hard at it
释义	be hard at it 专心致志于…,刻苦钻研
随便看	effective circle force effective circuit permeability effective circulating blood volume effective circulation effective circulatory volume effective circum ference effective circumference effective clay content effective clearance effective coefficient of local resistance effective coercivity effective coil effective coil number effective coin effective coin/money effective collector effective collision effective collision cross-section effective collision number effective column height effective column length effective combat ceiling effective communication effective communication range effective competition jefg jehm jejf jejs jejz jels jens jeqx jerc jerf 49185 49186 49187 49188 49189 49190 49191 49192 49193 49194