政府下的人的自由是拥有一个普遍适用的常规生活准则，而不受另一个人的多变、不确定和武断意愿的支配。

Where I am, I don't know, I'll never know, in the silence you don't know, you must go on, I can't go on, I'll go on.

The galactic center is a unique natural experiment in strong gravity.

雎鸠在水面张翼低飞，黄莺在枝头婉转歌唱。河面鸳鸯交颈，空中群鸟飞翔。叽喳的鸣叫声，旋律动听美妙。逍遥于春光中，令我心情欢畅。