It has never existed. It will never exist.

它从来没有存在过，将来也永远不会。

youdao

No pains no gains, Pill of regret never exist.

一份耕耘，一分收获；没有后悔药。

youdao

What is that which never exist but still have a name?

什么东西不存在但仍有一个名字？

youdao

And many have imagined," one thinks here of Plato, perhaps, but also to Christianity" Many have imagined republics and principalities that have never been seen " or known to exist in truth.

因为已有太多的梦想家“,其中一人即柏拉图，但也可能是基督教“,“已有太多对共和,与君权的幻想,而那从来都未真实地存在。

耶鲁公开课 - 政治哲学导论课程节选

Still, environmentally sound natural gas production will never exist until producers themselves get serious about environmental management.

WSJ: Is Natural Gas the Road to a Clean Energy Future?

So, the Federal government is requiring our company to buy a product that does not exist, and likely will never exist.

FORBES: Regime Uncertainty and Obamacare

Zynga grew fast and hard under circumstances that will never exist again, and now its seeing whether or not it can hang onto that growth.

FORBES: Zynga Stock Sinking Along With Facebook -- Is Now The Time to Buy?