The way in which a man accepts his fate and all the suffering it entails... adds a deeper meaning to his life.
气候变化的挑战是我们这个世纪的战斗。
The land is the real client, not the person who pays the fee.
气候变化的挑战要求科学界采取紧急行动。
The method of psychology must be as exact as the methods of the natural sciences.