Faltering Arab states like Yemen, which faces new threats from young, radicalized Muslim insurgents, also need help maintaining the rule of law and exploring democratic pathways to political reform.

VOA: standard.2010.03.18

If they're going to survive thinking about this case at all, we need to throw in a no branching rule.

如果要让这个案例说得通，我们必须加入无分支规则。

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I've got two states here, three states here, two here, I need four, and if I can come up with these bonds, four, by the Hund rule I'd fill them like this.

我们已经有2个状态在这里，3个在这里，2个在这里，我需要4个，如果我能想到这些键，四个，通过洪特规则，我们就能像这样排布。

麻省理工公开课 - 固态化学导论课程节选

Do we need rule changes?

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"We need to rule out that there is a not long-lasting effect in healthy people, " Volkow said.

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For schizoid personality disorder to be diagnosed, doctors may first need to rule out conditions with similar symptoms, such as autism or Asperger's syndrome.

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