knuckle down

knuckle downknuckle downv.1.■(向某人)屈服,认输,开始认真工作,屈服

knuckle down1.■[美国英语]2.■(儿童玩弹子时)将指节贴地(准备打弹子)：You'll shoot in a truer straight line if you knuckle down.如果你把指关节贴在地面上打弹子，就会打得更准些。3.■开始认真工作；开始努力干活：I decide to knuckle down for an hour and get the job done.我决定认真干一个小时，把工作做完。4.■屈服,让步,投降,认输(=knuckle under):He would not knuckle down under their pressure.他不会在他们的压力下屈服的。