1. law of definite proportion 
   定比定律
2. change (a compound) by increasing the proportion of the electronegative part; or change (an element or ion) from a lower to a higher positive valence: remove one or more electrons from (an atom, ion, or molecule). 
   通过增加带负电荷的成分来改变一种化合物。
3. being in due proportion. 
   处于适当的比例之中。
4. sex ratio and sex proportion 
   性别比和性比例
5. a polymeric silicone compound. 
   一种聚合的硅化合物。

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• 1. 复比例
  合成机率 compound probability...复比例 compound proportion...复合二次形式；复合二次型 compound quadratic forms
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