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All the ski runs are carefully marked. And if there is something that might be dangerous, like a cliff or something, then they often put a fence around it.

所有的滑雪道都有清楚地标示出来。而且如果有什么危险的，像是悬崖或什么的，他们通常会在附近围上栅栏的。

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Then it becomes dark, dangerous and decidedly evil.

VOA: special.2009.06.12

We think we can actually model the mutations and limit it to the ones that are going to be biologically active or dangerous and then build vaccines ahead of time for the potentially dangerous strain of avian flu, if it comes along.

FORBES: Magazine Article

But the - once these areas became so dangerous then it caused these countries to pull their troops out much faster than they probably expected.

NPR: What Became of the Coalition of the Willing?

Hibs made the early running and John Rankin's low drive was gathered by Saints goalkeeper Enckelman, who then claimed a dangerous looking cross by de Graaf.

BBC: Sport - Football - Hibernian 0-0 St Johnstone