Soil of requirement of grow seedlings matrix loose, permeability is good, protect water fat, clean without disease, fertility is better.
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protect water fat
保护水脂
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The seal has a thick layer of fat under its skin to protect it from cold water in which it swims.
海豹皮下有一层很厚的脂肪，使它在冰冷的水中游泳时能够御寒。
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