电子并非一个简单不可分割的实体，而是一个复杂系统，其行为只能通过量子力学定律来理解。

大街几乎是对的。

It is by no means an irrational fancy that, in a future existence, we shall look upon what we think our present existence, as a dream.

技术应该服务于进步和保护。