Because of the great weight pressing down on them, these layers tend to fold downward at weak spots, and this finally causes an actual break in the crust.

由于巨大的重量向下压岩层，使它趋于在它的薄弱处向下折叠，这最终导致地壳的实质断裂。

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They often fold over or bunch up, turning them into booby traps for anyone shuffling down the hall.

它们经常折叠或堆成一堆，成了任何拖着脚走过大厅的人的陷阱。

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Don't fold down the corners of the page, it damages the book.

别把书页角折起来，这要把书弄坏了。

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"So we raise her up every morning We take her down every night, We don't let her touch the ground, And we fold her up right.

VOA: special.2010.07.02

You could think, you have to think earnings are going to go up twelve-fold to get it down to four times earnings, which will take a long, long time.

你可能会想，你必然认为收益会上涨12倍,让它回落到四倍于原来收益的地方，会花费很长一段时间。

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And they fold down to cover the USB ports and microphone jacks, acting as dust covers.

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However, the seat backs fold down easily, creating a flat-floor cargo hold with 44 cubic feet of stowage.

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The seats will fold down into beds, and each suite will have its own flat-screen monitor for in-flight entertainment.

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