释义：在昏暗不明的环境中，若仍能保持光明的心境，内心就能像青天白日一样明亮无染。

There can be no permanent progress in the battle against hunger until the agencies that fight for increased food production and those that fight for population control unite in a common effort.

The world is an extremely dangerous, untrustworthy, unreliable place.

你的最不满意的顾客是你最大的学习源。