的比例的英文：
in proper

参考例句：

A scale of ten kilometres to the centimetre,a scale of one to a million.
一厘米代表十公里的比例、一比一百万的比例。

neutralization ratio
中和比率|中和比例

be directly [ inversely,reciprocally ] proportional to
与...成正[反]比例

liquid proportioner
液体比例(混合)器

To divide,distribute,or assess proportionately.
按比例分配按比例分、分发或估量

Engel coefficient
恩格尔系数(食品开支占总支出的比例)

To divide and distribute proportionally;apportion.
分配，配给按比例分割并分配;分摊

duple ratio
加倍的比例(如二比一,八比四)

Converting them into simpler percentage rates is an overdue reform.
把定额增收转变成按比例增收是一迟到的改革。

The ratio of luminous flux at a specific wavelength to the radiant flux at the same wavelength.
发光效率一定波长的光量对同样波长的辐射光量的比例。

proper是什么意思：
adj. 适合的；正当的；固有的；严格意义上的

Cheat's never proper.
欺骗决非正当事。

Action is the proper fruit of knowledge
行动是知识的巧果

They were in proper tennis whites.
他们都穿着可体的白色网球服。

I deem it proper to refuse.
我看还是拒绝为好。

One forth is a proper fraction.
四分之一是一个真分数。