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The attosecond timescale is to electron motion what the high-speed camera was to studying animal locomotion.
A society that puts equality before freedom will get neither. A society that puts freedom before equality will get a high degree of both.
我们必须在经济增长和环境责任之间取得平衡。
大多数人害怕变化,但如果你把它看成是某种你总是可以依赖的东西的话,那它就能成为一种安慰。世上你能依赖的东西并不是很多。