The relation between what we see and what we know is never settled.

化学中最重要的工具不是烧杯或光谱仪，而是想象力。

It's not always rainbows and butterflies, it's compromise that moves us along.

Do not follow where the path may lead. Go instead where there is no path and leave a trail.

友谊是人生最珍贵的财富。