During the rainy season-mid-november through late april-the falls virtually disappear behind a thick wall of mist; at other times, the water volume noticeably eases.

在雨季- 11月中旬到4月下旬-瀑布几乎消失在厚厚的雾墙之后，而在其他时间，水量则明显缓和。

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Being protected by a thick wall, they felt quite safe.

有一堵厚墙掩护，他们感到很安全。

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Being protected by a thick wall, they felt they were safe.

有一堵厚墙掩护着，他们感到很安全。

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At night, a thick wall of noise seemed to edge closer and louder in proportion with my sleeplessness.

WSJ: A Trumpet in the Wild

Woods hooked his tee shot deep into the trees, where he was surrounded by a thick wall of fans.

NPR: Sergio Implicates Tiger For Bad Shot At Players

He is only allowed to see his family once a year and visitors are separated by a thick wall of glass.

BBC: Belarus's university in exile