夏普博士说如果月球岩石中氢的初始含量接近地面的岩石，氯同位素比例比率不会这么分散。

Dr Sharp said that if lunar rocks had initial hydrogen contents anywhere close to those of terrestrial rocks, the chlorine isotope ratios would not have so much scatter.

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不安全注射操作方面的数据表明，在全世界，反复使用未经消毒的针管和针头进行注射的比率高达40%，而且在某些国家该比例可高达70%。

Unsafe injection practices: Data show that worldwide up to 40% of injections are given with syringes and needles reused without sterilization and in some countries this proportion is as high as 70%.

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几个来回下来，你能完全掌握这些配方，这种应用软件提供了食材的比例，一个好的食材比率是部分液体和面粉与一半鸡蛋相等。

With ratio, you can do away with recipes altogether. This app gives ratios for food fundamentals. A batter ratio is equal parts liquid and flour and half that much egg.

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The difference between ratio is a reward every certain number of times somebody does something.

比率强化意思是,间隔一定比例才给予奖励。

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