let up

• • 让…上去；让…上楼：

    The boss asked the secretary to let the client up.

    老板要秘书让客户上楼来。

  • [口语]停止，中止；(风雨等)减弱：

    The wind let up during the night.

    风在夜间停了。

  • 放慢；放松，松劲，松弛；缓和；减缓：

    Don't let up before you get all things finished.

    所有事情干完之前不要松劲。