名词
中文翻译：摆锤
同义词：
['pendulum', 'pendulum rod', 'pendulum arm']
例句：
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1.The pendulum rod swings back and forth in the breeze.
风中摆锤来回摆动。
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2. The pendulum rod is used to measure the length of a rope.
摆锤用来测量绳子的长度。
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3.The pendulum rod was used to determine the direction of the wind.
摆锤被用来确定风的方向。