名词
中文翻译：Unknown
同义词：
['vibration', 'oscillation']
例句：
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1. The blade of the knife is making a vibrating sound.
刀的刀片在发出振动声。
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2. The machine's blade is making an oscillating motion.
机器的刀片正在做摆动运动。
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3. The blade of the sword is vibrating against the stone.
剑刃在石头上振动。