同时由于它过滤了每个请求，你可以执行安全特定的逻辑以保证只有满足一定标准的请求才被允许通过。

And because it filters every request, you can perform security-specific logic to ensure only requests that meet certain criteria are allowed through.

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它借给类一个将类放置到位的名称，反过来，该类保证特定方法将可用。

It lends a class a name that gets it into places, and, in return, that class guarantees certain methods will be available.

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网络供应商并未保证特定质量的服务，而仅仅承诺了尽其所能。

Network providers do not guarantee a certain quality of service, but merely promise to do their best.

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The goldsmith might also write notes promising so much gold and not promising the return of any particular item of gold.

这个金匠会写下票据,保证归还一定数量的金子,但是不保证归还某个特定的金器

耶鲁公开课 - 金融市场课程节选

Certain segments of DNA are being converted into RNA, and whereas in replication, you have to copy the whole genome, the whole - all of the chromosomes, all of the DNA contained in the chromosomes of the cell in order to completely replicate it; transcription only works on particular sequences of DNA.

特定的DNA序列被转录为RNA,在复制的过程中,整条染色体都被复制,包括其中的全部DNA序列,都被分毫不差地复制下来,以保证复制的完整性,而转录过程只发生在特定的DNA序列上

耶鲁公开课 - 生物医学工程探索课程节选