Phelps has never tested positive for a banned substance.
菲尔普斯从未在药检中检出阳性。
We never tested XP, but I think we have cherry-picked some parts of it - like pair-programming.
没试过XP，但我想我们精心地选择了一些实践，比如结对编程。
You may have never tested the program under this particular environment, but you know how it should work.
你可能从未在一种特殊配置环境下测试过程序，但是你知道它应该怎样工作。
But Armstrong, who has never tested positive for performance-enhancing drugs, has consistently denied the allegations.
而阿姆斯特朗则一直否认此项对他的指控，在药检中，他也从未被检测出呈阳性。
Unless you work on loss-of-life-critical software, you probably have never tested code to that extent or seen it so tested.
除非是影响生命安全的重要软件，否则您可能从来不会如此详细地测试代码，也不会了解到原来它是如此测试的。
And our products are never tested on animals.
而我们的产品是从来没有在动物身上进行测试。
And our products are never tested on animals.
而我们的产品是从来没有在动物身上进行测试。
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