The ability of this virus to cause rare but severe disease in humans is well documented.

已有大量文件证明该病毒在人类引起罕见但严重的疾病的能力。

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We all have our ups and our downs, our good days and our bad days, but severe, chronic depression is something different.

我们都有开心的时候，忧郁的时候，有快乐的日子和糟糕的日子，但是，长期而严重的抑郁症是有所不同的。

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The 2007 storm was exceptionally damaging, but severe storms are becoming more frequent, according to a state report on climate change submitted in January to the Iowa Legislature and governor.

根据一月份递交给爱荷华州立法院和管理人员的州气候变化报告中所述，2007的暴风雨极具破坏性，危害严重的暴风雨时常发生。

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"There were severe weather problems, not just in Russia but also in some of the other former Soviet Union countries."

VOA: special.2010.12.07

But to do that is I recognize not without dangers often severe dangers of its own.

但一旦这么做，我要坦言，不是没有风险,通常还会是来自其本身的巨大风险。

耶鲁公开课 - 政治哲学导论课程节选

This is a very-- it's fascinating that it happens at all, that you have severe damage but compensated with some powerful skill.

这种现象总会发生,个体出现严重损伤,但某些技能却会变得强大以作为补偿

耶鲁公开课 - 心理学导论课程节选

Also, in all but severe cases of spouse abuse, the government prefers family counseling and mediation rather than arrest and jail.

CNN: SINGAPORE

But severe storms are possible along a line from the southern Great Lakes to the Louisiana coast, the Storm Prediction Center said.

CNN: STORY HIGHLIGHTS

Some patients can be treated as outpatients, but severe pain or pain with nausea may need to be treated in the hospital.

CNN: What can I do for kidney stones?