This kind of concept formed before students accepting of formal and scientific education is generally called pre-scientific concept or pre-concept.

这种在接受正规的科学教育之前所形成的概念一般称之为前科学概念（或前概念）。

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This strategy, known as pre-exposure prophylaxis, or PrEP, is based on the concept that blocking HIV's replication immediately after exposure to the virus may prevent infection.

这一策略被称为“暴露前预防”(PrEP)，是建立在这样的概念基础上：在接触病毒之后立即阻断HIV的自我复制可以预防感染。

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The concept involves pre-allocating a pool of memory and reserving it until it is actually needed.

其思想是预分配一个内存池，并保留到真正需要的时候。

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So far not even Mr Blair has felt able to endorse either the American idea that Iraq is an imminent threat (as opposed to a longer-term one), or America's concept of pre-emption.

ECONOMIST: Lawyers on both sides are not short of ammunition

Test Track guests enter an all-new, interactive pre-show area that includes concept cars like the Miray roadster and the Chevrolet EN-V, as well as dynamic media displays that include models and sketches of vehicle design possibilities.

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Governments may be good at certain things that advance technology, such as the peer-reviewed funding of basic research and pre-commercial development (including demonstrations of proof-of-concept), but they are rarely leaders in technological innovation.

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