Each request carries some data over the network; if the request does not find any updates on the server, this data transfer is a waste.

每一次请求都要在网络上传输一些数据；如果请求未在服务器上发现任何更新，那么这个数据传输就是浪费的。

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Each request has a number of parameters.

每个请求都有几个参数。

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Each request operates the entire service.

每一个请求都需要操作整个服务。

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Establishing TCP connections for each request consumes time and resources that slow down traditional browsers.

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But thanks to the Internet and some clever analytics, XOJet is able to price each request, offer a smart deal and make money.

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Each request should be considered individually and take into account factors such as the pupil's age, the timing of the proposed holiday and the overall attendance pattern of the pupil.

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