The universe began in a Big Bang about 13.7 billion years ago and has been expanding at an ever accelerating rate ever since.

宇宙大爆炸理论起始于137亿年以前，而且一直都以非常快的速度在扩张。

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For almost a century, the Universe has been known to be expanding as a consequence of the Big Bang about 14 billion years ago.

近一个世纪以来，人类知道宇宙因为140亿年左右前的那次大爆炸而在膨胀。

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Other groups are looking for even earlier clues in the cosmic microwave background, the leftover radiation from the Big Bang about 13.7 billion years ago.

其他组织正在寻找在宇宙微波背景下甚至更早些的线索，137亿年前的宇宙大爆炸残留的辐射物。

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But... I feel like the episode I saw of "The Big Bang Theory" was about them all liking comic books.

但是……我记得我看的那集是关于几个主角都喜欢漫画书。

就业很难 - SpeakingMax英语口语达人

The cosmos was born in the Big Bang about 13.7 billion years ago, and the first stars in the universe are thought to have lit up about 100 million years afterward, when gas finally gathered in clumps dense enough to collapse under their own gravity and ignite nuclear fusion.

MSN: We could soon detect the first stars in our universe

Which brings us to one of the things that economists bang on about.

FORBES: The French Don't Seem To Understand This Economics Of Google Thing Really, Do They?

People who bang on about innate differences should remember that variation within subgroups in the population is usually bigger than the variation between subgroups.

ECONOMIST: Schumpeter