The following rule is a useful test for intervisibility .

下面介绍一种检验通视的方法。

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Creating robust and useful test automation framework is a very difficult task.

创建健壮的、可用的自动化测试框架是个非常困难的事情。

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So after eight hours work, he still doesn't have a useful test nor has he succeeded in testing the original idea.

8个小时的工作之后，他还是没有得到一个有用的测试，而且也没能成功测试最早的想法。

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- And it's worth--; it's sort of a useful test for asking yourself -- what are the things you must value in life-- to ask, what would you choose to do if you knew you had five years, ten years, ? what have you?

而这值得;,这算是一种很有用的测试,用来问自己什么是你在生命中必须珍惜的事-,问你会怎么选择,如果你知道自己还有5年，10年，之类的时间？

耶鲁公开课 - 死亡课程节选

The team of researchers from the Johns Hopkins University School of Medicine say larger trials with a long follow up are needed to judge how useful the test might be in everyday practice.

BBC: Simple eye scan can reveal extent of Multiple Sclerosis

The connection between cholesterol and cardiovascular disease is by now so well established that inflammatory markers like CRP, while they may prove useful to test and treat, will not take the place of cholesterol any time soon, says Alan Daugherty, PhD, the director of the Cardiovascular Research Center at the University of Kentucky.

CNN: The cholesterol-inflammation connection

The Consumer Product Safety Commission said that they didn't find home test kits useful for detecting lead because in their test, they found too many false negatives and a few false positive test results.

NPR: Do Home Lead-Testing Kits Work?