Note that in a closed universe you could start a journey off in one direction and, if allowed enough time, ultimately return to your starting point; in an infinite universe, you would never return.

请注意，在一个封闭的宇宙你可以朝着一个方向开始旅行，如果允许足够的时间，最终将返回到出发点；而在一个无限的宇宙中，你永远不会回来。

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So if you have a chance to start a journey, don't hesitate to take it. It's full of surprises and you will never regret.

若你有一个旅行的机会，现在就行动吧，将来的你一定不会后悔！

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Life is short, and there's no guarantee of a tomorrow, today is the right time to start a journey that you'll look back on later in life and smile about.

人生苦短。明天是未知的，而今天则是开启新旅程的最佳时机，去做一些日后回想起来会让你嘴角上扬的事情吧。

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The restored steam engine travelled from its sheds near Earl's Court, west London, to start a journey from Kensington Olympia to Moorgate.

BBC: London

It is at the start of a journey Paris began a decade ago and is gauging reaction carefully.

BBC: Could Paris Metro inspire driverless Tube trains?

Microsoft's education director Steve Beswick welcomed the announcement as the "start of a journey" in changing how computer science is taught.

BBC: Computer science part of English Baccalaureate