They were almost knee-deep when they realized it was a hot spring。

当他们意识到这是一个温泉时，水已齐膝深了。

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They were almost knee-deep when they realized it was a hot spring.

他们意识到这是一个温泉的时候，水已经齐膝深了。

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Next morning the spring flowers were all hidden under deep snow.

第二天早晨春天的花儿都被厚厚的雪掩埋了。

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Now, more than ever, we expect change overnight, and while it appeared to change that quickly in the Middle East this spring, deep, meaningful and sustained change takes a long time.

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Spring blooms, deep and blanketing winters, glorious summers and stunning autumns.

BBC: New England week

The flooding, which began on the night of 31 January, was caused by a combination of a high spring tide, deep atmospheric low pressure which raised sea levels and exceptionally strong northerly gales, which led to a surge of sea water over coastal defences.

BBC: Flooded street in King's Lynn