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なりを潜める， 鳴りを潜める， 鳴りをひそめる， なりをひそめる
1. to quieten down, to fall silent
2. to cease activities, to become inactive, to lie low, to keep a low profile
安静下来，陷入沉默；停止活动，处于休眠状态，保持低调，不引人注目
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潜入， せんにゅう
1. infiltration, sneaking in, going undercover
潜入