They are often in direct proportion to their wealth.

而这一点往往和他们的财富水平成正比。

Ability is always in direct proportion to the effort.

能力永远和曾经的付出成正比。

What you get is in direct proportion to what you give.

你所得到的与你所付出的成正比。

Efficiency rises in direct proportion to the incentives offered.

效率与激励成正比增长。

The voltage in the signal varies in direct proportion to the sound wave.

信号中的电压按声波比例变化。