The World health Organization (WHO) called the outbreak "a public health event of international concern" but did not raise the threat level to a pandemic.

世界卫生组织将这场流感称之为“国际关注的公共卫生事件”，但没有将威胁提升至大流行的水平。

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ATK will design, build and install the virtual space environment called the space Threat Assessment Testbed System, company officials said.

AT K公司将设计、建造并安装这个虚拟的空间环境，该环境被称为空间威胁评估测试平台系统。

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He called the threat serious and significant.

他说，这样的威胁是严重和显著的。

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In two thousand eight Norway opened a so-called doomsday vault designed to be secure from any threat -- even an asteroid strike.

VOA: special.2010.08.24

And the issue is called "stereotype threat."

这个问题被称为“刻板印象威胁”

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The situation along the southern border is being called a national security threat.

VOA: special.2009.03.14

Some farmers called the threat crude propaganda and continue to send their crops for animal use.

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The Clinton administration continues to insist that hundreds of millions of tax dollars flow to Russia through the so-called Cooperative Threat Reduction (CTR) program, known universally as Nunn-Lugar funding after its congressional sponsors -- Sens.

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There was also pushback from users who called it a threat to free speech.

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