不相容原理无法从旧量子力学中推导出来,而是一条新的自然法则。
中心地是交通和通讯线路的交汇点。
The improvement of understanding is for two ends: first, our own increase of knowledge; secondly, to enable us to deliver that knowledge to others.
农民是我们经济中唯一以零售价购买一切、以批发价出售一切,并双向支付运费的人。
If we don’t take responsibility for our plastic waste today, we’ll leave a burden too heavy for future generations to bear.