找到自己的最好方式是将自己奉献给他人。
煤炭的未来取决于经济增长与环境保护之间的平衡。
世人很少知道,有多少经过科学研究者脑海的思想和理论,被他自己的严厉批评和反面检验默默扼杀。
"The world is full of people who have never, since childhood, met an open doorway with an open heart."
Mental activity is the organism's dialogue with its environment.