From here, you can see there are four processors to call upon.

在此示例中，您可以看到有四个处理器可供调用。

youdao

Of course, you may be reluctant to call upon a friend for help because you don’t want to admit you need it.

当然你可能会为向朋友寻求帮助而感到难为情，因为你不想承认你需要帮助。

youdao

In this case, the owner was luckier than most. He had some 12, 000 followers on Twitter to call upon for help.

在这个事例中，失主比其他人幸运，他在微博上有大约1万两千个粉丝可以召唤来帮助自己。

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We cannot find them. Today I call upon you to travel a new trail.

VOA: special.2010.04.08

It even has the right to call upon other countries to help it with the technology.

FORBES: Stuxnet and the Iranian Nuclear Program

Fortunately for George Carman, Mr Al Fayed's formidable defence counsel, there were other witnesses to call upon.

ECONOMIST: Al Fayed’s Pyrrhic victory | The

Photographers in Africa continue to call upon their rich and diverse cultural heritage, while deftly confounding western expectations.

BBC: A new look to African art