It is a strange fact, characteristic of the incomplete state of our present knowledge, that totally opposite conclusions are drawn about prehistoric conditions on Earth.
一个奇怪的事实是，关于地球史前条件得出了完全相反的结论，这反映了我们目前知识的不完整状态。
你知道，有些鸟儿是注定不会被关在牢笼里的，它们的每一片羽毛都闪耀着自由的光辉。
Coal has been the backbone of industrial progress, but its future must balance economic needs with environmental responsibility.
如果一件事情对你很重要，即使成功的概率很小，你也应该去做。
水是生命之源，也是毁灭之力。
数学家是把咖啡转化为定理的装置。
Management is an art that requires continuous learning and practice.