difficult to earn a living

It is very difficult to teach illiterate people the paths to good health, the advantages of family spacing, the way to increase crop yields, nutrition for their children, and how to earn a living.

要教导不识字的人们了解健康之道、生育间隔的优点、增加作物产量的方法、注重子女的饮食营养乃至于如何谋生，都非常不容易。

He was the first well-known American writer to try to earn a living through writing alone, resulting in a financially difficult life and career.

他是第一个尝试完全依赖写作谋生的知名美国作家，从而导致贫困潦倒。