As long as the browser keeps a DNS record in its own cache, it doesn't bother the operating system with a request for the record.

只要浏览器保持其自己的缓存中的DNS记录，它不会打扰带有记录的请求的操作系统。

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Thus, a process with dynamic memory requirements will need to issue system calls (request memory and release memory) to inform the operating system of its changing memory needs.

因此，一个有动态内存需求的进程需要发出系统调用(请求内存和释放内存)通知操作系统它的这一内存变化需要。

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In operating systems, a system call, also known as a system service request, is the mechanism an application USES to request service from the operating system's kernel.

在操作系统中，系统调用，也称为系统服务请求，是应用程序用来向操作系统内核请求服务的一种机制。

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Currently, Chrome follows standard industry practices to resolve Web addresses: Chrome sends a request to the underlying operating system which reaches out to another computer on the Internet known as a DNS server.

FORBES: Why a small change to Google Chrome could have big implications for Internet users

Its 14-page complaint said users needed to request digital keys from Microsoft to install another operating system.

BBC: Microsoft faces European open software probe