Banking is inherently fragile because it involves transforming liquid liabilities into illiquid assets.

在野外，没有第二次机会。你必须第一次就做对。

The beauty of topological insulators lies in their robustness; their surface states are protected against disorder and imperfections.

对天资在中等程度以上的人，可以和他谈论高深的学问；而对于中等以下天资的人，则不可以和他谈论高深的学问。