真相很少是纯粹的，也从不简单。
There are other reasons --There are other reasons why it's perhaps harder now to feel calm than ever before. One of these, and it's paradoxical, because it's linked to something that's rather nice, is the hope we all have for our careers. Never before have expectations been so high about what human beings can achieve with their life span.
化学是在分子水平上操纵物质的艺术，而催化是其最强大的画笔。
The key to sustainable development is to balance economic growth and environmental protection.
数学的历史是人类好奇心和创造力的历史。
The simplicity of nature is not to be measured by that of our conceptions.
听到别人指出自己的过错，就感到高兴。
