The attosecond timescale is to electron motion what the high-speed camera was to studying animal locomotion.
如果时空穿梭是可能的,那从未来穿越回来的旅客在哪里呢?
People haven't always been there for me, but music always has.
今天种下的每一棵树都是对明天的承诺。
Sometimes, the hardest part of solving a case is facing the truth.