名词
中文翻译：比率
同义词：
['ratio', 'proportion', 'counter']
例句：
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1. The ratio of students to teachers in this class is 5:1.
这个班级学生与教师的比例是5:1。
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2. The teacher used a ratio counter to measure the ingredients.
老师用一个比例计量器来测量原料。
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3. The ratio of sugar to water in this recipe is 1:2.
食谱中糖和水的比例是1:2。