knuckle down

• • [美国英语]
  • (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。

  • 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。

  • 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。