為什麼曾經斥責子女玩手機的父母，如今自己卻比年輕人沉迷得更深？答案是生理退化、算法算計與社會支持缺位三重因素共謀的結果。
The scientists were already investigating the problem of pollution from space debris when they realised a SpaceX Falcon 9 had failed in flight.
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It's not being rolled out yet, but I expect it to be deployed by this time next year.
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