One reason for suffering, is the pursuit of the wrong things.

人之所以痛苦，在于追求错误的东西。

youdao

One reason is that more countries are big oil producers now, so the nations suffering from the price drop account for a larger share of the global economy.

其中一个原因是，现在越来越多国家大量生产石油，因此在全球经济中，深受油价下跌之苦的国家所占份额更大了。

youdao

One reason for the ex-communist countries' relative fortune is that they are not a homogenous block all of which is suffering in the same way.

ECONOMIST: Eastern Europe's economies