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The attosecond timescale is to electron motion what the high-speed camera was to studying animal locomotion.
阿秒时间尺度对于电子运动的研究,就像高速摄像机对于研究动物运动一样重要。#
Sometimes the hardest thing and the right thing are the same.
The proof of a system's value is its existence.
希望迟迟不来,苦煞了等待的人。