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If society is to exist as a unity, its members must have shared values.

社会若要成为一个统一的群体，它的成员就必须有共同的价值观。

《牛津词典》

Two theories exist as to why.

有两种理论解释了其中的原因。

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The memorial is to exist as a video project, a Web site and as a book.

VOA: special.2009.05.06

And why is that? Within the perspective of Milton's free-will theology, sin can't exist as an external reality.

为什么呢？从弥尔顿自由意志的学说的角度来看，原罪是不可能以永久现实的形式存在的。

耶鲁公开课 - 弥尔顿课程节选

In fact, they're no longer capable of reproducing; all they can do is exist as red blood cells and then die.

事实上,红细胞已经不能再增殖了,它们所能做的只是,作为红细胞过完一生然后死去

耶鲁公开课 - 生物医学工程探索课程节选

If the sale goes through, the NYSE will no longer exist as an independent entity.

FORBES: What The Sale of NYSE Means: The Decline of Management

Note that Microblogging did not exist as a category in 2008, but is rising fast.

FORBES: Business and Web 2.0 An interactive feature

Yet the question remains, will Energy Conversion Devices even exist as a company a year from now?

FORBES: Solar Stocks That May Not Survive to 2014