He burned all the important documents for fear that they should fall into the enemy's hands.

他把所有的重要文件全部烧毁以免落入敌人的手中。

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Plenty of folks are so contrary that if they should fall into the river, they would insist upon floating upstream.

有许多人总故意作对，他们即使掉进河里，也还会坚持往上游漂。

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By all laws of physics, spiders as big and heavy as tarantulas shouldn't be able to climb walls or hang upside down-they should fall on their heads.

根据所有的物理定律，像狼蛛那么大、那么重的蜘蛛都不应该会爬墙、会倒悬，倒悬着就应该头朝下摔下来。

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Mr Dell added that the new touchscreen products would cost more to produce than their non-touch equivalents, suggesting they should fall within the price bracket Dell targets, rather than the super-low end of the market that it had opted out of.

BBC: Dell looks to future tablets as consumer sales slump

The budget pushed the administration's financial reserves to the limit, he said, adding that the opposition will have to explain where the axe should fall if they want to spend money elsewhere.

BBC: Carwyn Jones faces united opposition to Labour's budget

They were also concerned that Europe should not fall behind in research on chronic human ailments such as Alzheimer's.

BBC: EU tightens rules on welfare of lab animals