名词
中文翻译：比例
同义词：
['quantity', 'proportion', 'proportionate', 'ratio', 'ratio of']
例句：
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1. The teacher explained the concept of ratio to the students.
老师向学生们解释了比例的概念。
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2. The ratio of sugar to water in this recipe is 1:1.
这个食谱中糖和水的比例是1:1。
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3. The ratio of carbon dioxide to oxygen in the air is 0.049:0.029.
空气中二氧化碳与氧气的比例是0.049:0.029。