It's a complex system wherein data is copied to multiple intermediate devices, usually to speed up access to files when millions of people are trying to access the service at the same time.

这是一个复杂的系统，数据被复制到多个中间设备，通常是为了在数百万人同时试图访问服务时加快文件访问速度。

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That is, you make sure that only one thread at a time can access a certain data structure by locking and unlocking it.

这就是说，通过线程的锁定和解锁，对于某一数据结构，确保某一时刻只能有一个线程能够访问它。

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Once you have embedded a file as a resource, you must learn how to access it at run time.

一旦将某个文件作为资源嵌入，就必须了解如何在运行时访问它。

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This is from a U.S. Government website called treasurydirect.gov and you can get on and access it at any time.

来自于美国政府网站,treasurydirect.gov,你们也可以随时访问

耶鲁公开课 - 金融市场课程节选

The IRS suggests that small businesses should back-up at year end, limiting IRS access to one year at a time.

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People were increasingly going online to access services at a time and place that suits them, the minister said.

BBC: Mouse and laptop

And the company's SharePoint products allow documents be placed in a central repository that several people can access at the same time from different locations.

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