The desk has a harsh surface.

这书桌表面粗糙。

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As scientists delve deeper beneath the ocean's surface, they find bizarre creatures that have adapted to harsh and extreme environments.

随着对海洋的探索研究越来越深，科学家们发现了一些怪异的生物，他们已经适应了海底那恶劣、严酷的极端环境。

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Following the Mama Bongisa advice, they mounded the earth to get as much surface area as possible and to prevent Kinshasa's harsh rains from flooding the beds.

按妈妈促进会的建议，他们堆起土，尽可能地扩大面积并防止金沙萨的暴雨冲垮菜地。

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Held in a scoop on the rover's mechanical arm, the tablespoon of pulverized gray rock offers planetary scientists their first sample from the planet's interior, where it may have been sheltered from the harsh surface chemistry and ultra-violet radiation.

WSJ: Rover on Mars Extracts First Rock-Core Sample