的比例的英文：
in proper

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。

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。