唯一安全的系统是关闭的，浇筑在混凝土块中，并密封在有武装警卫的铅衬房间中。

系外行星的研究是一段充满惊喜和挑战的发现之旅，激励着我们不断前进。

We should weep for men at their birth， not at their death.

Optimize your generosity. No one on their deathbed has ever regretted giving too much away.

生活就像一辆十档变速自行车，我们有各种档位选择，很多人却忘了用。