to be directly/inversely proportional to sth

At constant temperature, the pressure of a gas is proportional to its volume.

温度不变, 则气体压力和其体积成反比例.

Families with children spend proportionally less per person than families without children.

有子女家庭比无子女家庭的人均开销相对地少。

The rate of change of velocity, for a given body, is directly proportional exerted on it.

对于一个物体, 其速度的变化率与它所受的力成正比.

But since the battery is fairly thin, how long it lasts is proportional to its area.

由于电池非常薄, 所以它的使用时间就与其面积成正比.

...a proportional fee based on the final sale price.

与最后销售价格成比例的费用

Current is proportional to voltage with resistance being constant.

如果电阻保持不变,则电流与电压成正比.

Objective : To investigate the proportional relationship between lip and chin.

目的: 寻求西安地区汉族青年正常牙合颅面部颏、唇区垂直向的比例关系.

Quentin : Well a proportional representation system would solve that problem.

昆廷: 比例代表制可解决这个问题.

He said the proponents of proportional representation were advocating a gigantic and fundamental constitutional change.

他说,支持按人口比例选举代表的人主张对宪法进行重大的根本性修改.

I wouldn't be sorry to see proportional representation and I think it's a thing which will gradually come in.

我不会为比例代表制的出现而难过，我认为这种制度将逐渐流行起来。

Which one of the following parliaments or assemblies does not use proportional representation?

以下哪个议会没有采用代表制?

Either way, we are going to end up with some version of proportional representation.

无论哪种选择, 最终我们都会获得某种“比例代表制”.

Candidates are elected under a proportional representation system.

选举采用比例代表制.

The amount of scattering will thus be proportional to the number of electrons.

于是散射辅射的量将与电子数成正比.

Loss of weight is directly proportional to the rate at which the disease is progressing.

体重的下降与病情发展的速度成正比。

The amount of food a child needs is roughly proportional to its size.

小孩需要的食物量与他的个头大致成比例.

Payment will be proportional to the amount of work done.

酬金将与工作量成比例.

The information content is then proportional to the bandwidth of the imposed variation.

此时信息容量正比于所载入的变化的带宽.

Strain is proportional to stress.

应变量与应力成正比.

Salary is proportional to years of experience.

薪金视资历而定。