名词
中文翻译：比例尺
同义词：
['scale', 'gauge', 'caliber']
例句：
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1. The engineer used a ratio-meter to measure the length of the beam.
工程师使用比例尺来测量梁的长度。
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2. The doctor measured her blood pressure with a ratio-meter.
医生用比例尺测量了她的血压。
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3. The carpenter used a ratio-meter to ensure that the boards were evenly spaced.
木匠使用比例尺确保木板排列得均匀。