Blastocyst complementation across species had never been tested before, but we have now shown that it can work.

在此之前从未实验过跨种族的囊胚互补，但据我们的实验显示，这是可以实现的。

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But it will become a problem when lists grow over time or when the custom code has never been tested with live data.

不过当列表增长数倍，或自定义代码从未在实际数据上测试过的话，这将成为一个问题。

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This article shows you how to develop a unit test suite for legacy code that's never been tested, using jEdit as an example.

本文使用 jEdit 做为例子，向您展示如何为从未测试过的遗留代码开发一个单元测试套件。

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"We're testing Einstein's theory in a region where it has never been tested before, " said Dr. Freire.

WSJ: Einstein Proved Right on Gravity��Again

Everyone knows it is supposed to be strong enough to resist meteorites, but it has never been tested.

CNN: ASIANOW - TIME Asia | China: Inside China's Search for Its Soul

Important decisions are made based on spreadsheets that were created years ago that have never been tested for quality and accuracy.

FORBES: Can IT Cope With Empowered End-Users?