A final layer of dry plant material shall be added to the waste/compost to protect it from direct rainwater contact while it decomposes.

同时要把干燥的植物覆盖在粪便或堆肥物的表层，这样可以避免分解过程中的猪粪与雨水接触。

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"A liquid water layer or pocket in contact with the rock, which is deep below Enceladus' surface, will acquire sodium from the rock - essentially leaching the rock," he says.

“这些液体水深藏在土卫二的地壳内部中的岩石中，并逐渐通过过滤作用从岩石内部获得钠元素。”Lunine说。

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Analyze the contact between each bluetooth protocol layer, and provide the operating theory of bluetooth protocol system.

分析蓝牙各层协议之间的联系，并给出蓝牙协议系统的运作原理。

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In the most concentrated areas, he says, it could be compared to products you would clean your kitchen with, causing dry or cracked skin, or - in cases of prolonged contact - it can "lift off the top layer of your skin".

BBC: How toxic is Hungary's red sludge?