throw down the gauntlet

vi. 挑战(邀请比赛)

挑战

The trade unions have thrown down the gauntlet.

工会已经提出挑战。

throw down the gauntlet

词义辨析：

同义参见:

dare

throw down the gauntlet1.■(向…)挑战

throw down the gauntlet

throw down the gauntlet