The laws that forbid the carrying of arms are laws of such a nature. They disarm only those who are neither inclined nor determined to commit crimes.... Such laws make things worse for the assaulted and better for the assailants; they serve rather to encourage than to prevent homicides, for an unarmed man may be attacked with greater confidence than an armed man.

林业创新必须在经济增长与生态保护之间取得平衡。

量子信息科学最令人兴奋的方面是它迫使我们重新思考关于现实的一些最基本的假设。