我在你们这个年龄,最害怕的不是贫穷,而是失败。
What I feared most for myself at your age was not poverty, but failure.
阈限性是两个阶段之间的过渡状态,个体既不属于这里也不属于那里,处于两者之间。
The concept of probably approximately correct (PAC) learning has been foundational in computational learning theory.
U.S. energy independence doesn't mean isolation - we're still part of global markets.
对于每一位专家,都会有一个同等的或者完全相反的专家。但对于每一个事实,并不一定就有一个同等的或者相反的事实存在。