Righting herself, she noticed the rope, which had run over a sharp rock, about to break.

恢复平稳后, 她发现绳子在一块锋利的岩石上的部分快要断掉了.

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These mattresses aren't exactly cheap but they're a lot softer to fall on than sharp rock.

这种垫子并不便宜,但是与其脱落时掉在坚硬的石头上,垫子要软得多.

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