Nothing is forever... and the time comes when we all must say goodbye to the world we knew.

没有什么事情是永恒的，而且总会有一天我们都得跟熟悉的世界说声拜拜。

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I am, in part, an ant biologist, so my thoughts turned to what we know about insect life and I knew that much in the world of insects remains unknown.

从某种程度上来说，我是一名蚂蚁生物学家，所以我开始思考我们对昆虫的生命有什么了解，并且我知道昆虫世界对于人类而言仍有许多未知的领域。

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We knew we were able to make the best games in the world, but the problem was that you had to do loads of versions to support all the different handsets.

我们知道我们有能力做出世界上最棒的游戏，但是问题是你不得不做一大堆的版本用来支持各种不同的手机。

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Now, there were some in Washington when President Clinton passed his first economic plans in 1993 who decried them as the end of the economic world as we knew it, that they would surely lead to recession and job loss and broader economic decline.

WHITEHOUSE: Press Briefing by Press Secretary Jay Carney,

Which brings us to the conclusion that we already knew: the world hates the United States.

FORBES: Americans Are The Coolest, Says Research. Belgians? Not So Much

As consulting chef to Windows on the World, I knew we had a winner in White Clam Risotto with Whole-Poached Lobster in Green Sauce, with its title's promise of festive and unusual flavors.

WSJ: The Rules of Recipe Attraction