Firefighters encountered a tangle of rattlesnakes, downed power lines and combustible propane tanks Wednesday as they struggled to get an upper hand on a wildfire that has destroyed dozens of homes.

本周三，这场野火已经烧毁了数十栋房屋，消防队员在于野火的斗争中遇到了一系列的响尾蛇，倒塌的电线和易燃丙烷储罐。

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The lack of folate might enable cancer to get the upper hand, allowing mutations to occur unchecked.

缺少叶酸则可能会使肿瘤占上风，使之发生未加抑制的突变。

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Only occasionally, when I was driving my car, or when I was in Hanna's apartment, did thoughts of it get the upper hand and trigger memories.

仅在我偶尔驾车时，或我在汉娜的公寓时，这种思想才占了上风，触发了回忆。

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When things get staid and lose their volatility, the bad sides of human character get the upper hand: Greed and laziness.

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That's vital if Chinese consumers are to get an upper hand and contribute to a rebalancing of world trade and financial flows.

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As firefighters try to get the upper hand on the blaze near Fort Collins, which has burned large swaths of private and U.S. Forest Service land since it began June 9, local authorities have dispatched roving patrols to combat looting.

MSN: Nuns, Boy Scouts among new wildfire evacuees