名词
中文翻译：平衡器
同义词：
['counterweight', 'counterbalance例句：1. The balance cock on the scale is adjusted to zero.（秤上的平衡杆被调整到零。）']
例句：
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1. The balance cock on the scale is adjusted to zero.
秤上的平衡杆被调整到零。
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2.The engineer balanced the weights to ensure stability.
工程师调整了重量以确保稳定性。
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3. The balance cock was used to adjust the weight of the machine.
平衡杆被用来调整机器的重量。