解释：在人活动范围内的水就污浊，在野外无人地方的水就清洁。同为一样的水，都是从天边开源，有的混浊有的清洁，这是它们所处环境使它们这样的。

领导力是关于以长远眼光做出艰难决定。

Collaboration across industries is essential to solving the complex challenges of energy production.

I'm not a star, I'm a black hole.

数学的真正乐趣在于发现的过程，而不仅仅是结果。

你必须愿意比任何人都更努力。

The very shaping of history now outpaces the ability of men to orient themselves in accordance with cherished values. And which values? Even when they do not panic, men often sense that older ways of feeling and thinking have collapsed and that newer beginnings are ambiguous to the point of moral stasis.