Because their behaviors are not usually seen as a red flag, these young people have been dubbed the "invisible risk" group by the study's authors.

因为这些年轻人的行为通常不被视为危险信号，因此该研究的作者们称他们为“隐形风险”群体。

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Step 6: Adding a Group By operator.

步骤6：添加一个Group By操作符。

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Drag it to the right of the Group By operator.

将它拖放到Group By操作符的右边。

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The observance is organized by a conservation group, the World Wide Fund for Nature, also known as the World Wildlife Fund.

VOA: special.2010.03.22

But in any event, this suggests that these settlements were established peacefully, not by a group coming in and conquering.

但无论如何也显示了,这些居住所是被和平地建成的，而不是由一个部族进入然后攻占。

耶鲁公开课 - 旧约导论课程节选

I went to the Middle East with a group of faculty members and other students, including this faculty member that I spoke about, who by the way was also a Jewish and that was an important learning for me.

我去了中东地区,和一些教授以及学生一起，这其中就包括刚才我提到的导师，她还是个犹太人,这一点也让我学到很多东西。

普林斯顿公开课 - 人性课程节选

Hamas, as we know, is listed as a terrorist group by the West and Israel.

NPR: Gaza Cease-Fire Disrupted by Gun Battle

It is the leading cause of blindness in this country, in this age group by far.

CNN: Smoking quadruples risk for vision-stealing eye disease

At first glance, of course, it would be easy to define this group by their differences.

WHITEHOUSE: President Obama Speaks at a Naturalization Ceremony