An HIV test reveals infection status by detecting the presence or absence of antibodies to HIV in the blood.

艾滋病毒检测通过检查血液中是否存在艾滋病毒抗体，显示感染状况。

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By contrast, in the absence of such a structure, each it initiative might naturally come to its own conclusion as to what Customer Tax Status means and how it should be defined.

相比之下，如果缺少这样一个结构，每个IT方案自然会对Customer Tax Status的含义和应该如何定义这个术语得出自己的结论。

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It is the responsibility of our Ajax code to check for 304 status, and if found, simply not to change client application state based on the (absence of) data sent from the poll.

我们需要使用Ajax代码检查304状态，如果存在的话，那么也不要根据轮询发送的数据修改客户机应用程序状态。

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Purity, which is the absence of impurity, is a prerequisite for access to the holy or for holy status.

纯洁，不纯的反义词，是接近神圣或达到神圣状态的先决条件。

耶鲁公开课 - 旧约导论课程节选

The result Dr Rablen and Dr Oswald have come up with, though, suggests a positive effect associated with high status, rather than the absence of a negative effect, since unsuccessful nominees never know that they have been nominated.

ECONOMIST: Is two years extra life

Moreover, a paradox has emerged in our networked world where knowledge is ubiquitous and change is rapid, but the absence of a common vision and agenda ensures that the status quo will be maintained with respect to major global challenges.

FORBES: World Economic Forum Annual Meeting 2008

The country has been unable to benefit fully from its gas and oil deposits because of an absence of export routes and a dispute between the Caspian Sea littoral states over the legal status of offshore oil.

BBC: Turkmenistan profile