You will also want to test for any objects you need, and you may even want to test for the existence of identified elements you need as hooks for your script.

你可能还想测试所有需要的对象，甚至还想测试用作脚本钩子的标识元素是否存在。

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To do this, we'll assume the existence of a test factory.

要做到这一点，我们假定已经存在一个测试工厂。

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The existence of working code is a wonderful thing for setting up a test suite that defines what the problem you want to solve is, exactly.

得到已经正常运转的代码是非常有用的，这样可以制定测试组件，来精确定义你到底要解决什么问题。

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For years, he had been making the case that polymerase chain reaction (PCR) would be the best way to test for the existence of Earth-like DNA on Mars.

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If any four atoms, let say, atoms A, B, C and D, would be selected to test the decay, atom A would have much lesser chance to respond to decay due to the existence of atoms B, C and D.

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We first heard about the existence of the Acer M310 Windows Phone last week, but literally no information was given besides the fact that two test units were discovered on a developer's traffic sheet.

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