unmask one's batteries

动词 v.

英文释义

动词 v.
  1. To begin a decisive action, especially one that reveals one’s true strength or character. dated,idiomatic
    — “Your father is fond of surprises, as you must have seen,” Cuthbert rejoined. “He won’t unmask his batteries till all is ready for action.”
  2. Used other than figuratively or idiomatically: see unmask, battery.

词形变化

unmasks one's batteries present,singular,third-person unmasking one's batteries participle,present unmasked one's batteries participle,past unmasked one's batteries past

词源

From the revealing of artillery previously concealed from the enemy’s line of sight, immediately before opening fire.
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