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.
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