The ethical questions raised by CRISPR are not obstacles—they are essential conversations.

The world is a stage, but the play is badly cast.

龙吟虎啸，风鸾翱翔才是大丈夫的气象。像蚕茧蜘蛛丝、蚂蚁封巢、蝗蚓纠结般是小人的经营。

All things are composed of four elements – Earth, Water, Fire, and Air.”

形式化方法的美在于它们能够提供关于系统正确性的绝对确定性。