The best scientists are those who remain humble in the face of nature's complexity.

Great deeds are usually wrought at great risks.

瀑布歌唱道：我得到自由时便有了歌声了。

每个矿工的贡献对于保持灯火通明至关重要。

煤炭的可持续未来取决于我们能否在不牺牲依赖该行业的人的生计的情况下整合更清洁的做法。