你不得不等待早晨的报纸才知道世界各地正在发生什么事，这样的日子一去不复返了。

Gone are the days when you had to wait for the morning newspaper, to know what is going all around the world.

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最后，他赔付了男孩几百万美元才达成庭外和解，但他在职业生涯上的辉煌已然一去不复返。

He eventually settled out of court, paying the boy millions in return for dropping the case, but his career never quite recovered.

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以前孩子们在街区自由自在地闲逛，想和谁玩就和谁玩，街灯亮起了才肯回家。 这样的好日子早已经一去不返啦。

The days when children roamed the neighborhood and played with whomever they wanted to until the streetlights came on disappeared long ago, replaced by the scheduled play date.

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Like when they devised the first engines or the first nuclear reactors, it didn't work so well at first and then from the experience of many people working on it, over many years, a body of knowledge emerges and that's what we call technology.

这和发明出第一个发动机,或者第一个核反应堆时一样,最开始总是存在很多问题,但随着很多人不断努力去完善它,一种理论体系才得以不断发展,这就是我们所说的科技

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