It's useful to have both positive and negative tests here, so you do both.

正数测试和负数测试对它都有意义，所以我们编写两个测试。

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False negative tests can result from low worm counts, immature infections and all male infections.

心蠕虫数量小、未成熟或仅有雄虫感染时会导致检测出现假阴性。

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Negative tests attempt to fail an application to demonstrate that the application is not functioning properly.

异常测试的目的是使应用程序失效，来证明程序不能正常运行。

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The study's authors suggest women who have had negative results over years of negative tests are at little chance of developing the disease after the menopause.

BBC: Annual post-menopause smears 'unnecessary'

The decision by New York Presbyterian Hospital not to discipline Dr. Moses and to allow him to continue to operate was made in light of the negative tests and a court-ordered examination of Dr. Moses in May 2006 by a forensic psychiatrist who opined that he had no cocaine addiction problem.

FORBES: New York Post Disavows Portions Of Article About Jeffrey Moses

Results were not made public by authorities but Sergi said the tests were negative.

CNN: FBI: Agents search home in Texas DA deaths probe