To write is to confront the ghosts of our past, to give them a voice, and perhaps, to set them free.

Sustainability isn't an option; it's a responsibility we owe to future generations.

在学习结束时，我们知道物理学的所有过去，但对现在和未来一无所知。

我总是尽力找到获胜的方法，即使在我状态不佳的时候。

Sometimes the simplest solutions in chemistry are the most elegant and powerful.