In vertebrates, the immune system provides a multiple defense against internal parasites.

在脊椎动物中，免疫系统提供了对体内寄生虫的多重防御。

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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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Because the SDR's value depends on several currencies, it shares many of the benefits of a multiple-currency system.

ECONOMIST: Reserve currencies

Any delay in the multiple-line system will stop the line completely, while a delay in a single line might just delay one shopper.

WSJ: Find the Best Checkout Line

"We're going to be a multiple operating-system company, " Verizon's Mead said.

CNN: Android invasion arrives at CES