Permafrost is underground soils containing ice which keep frozen for several years, it is remains of ancient glacial climate.

多年冻土是埋藏于地表下多年不融化的含冰土层，是古代冰川气候的残留物。

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The results show cryoprotection technology and rinsing craft are effective to keep frozen aquatic products fresh degree, flavor and prevent freezing denaturation of protein.

说明了抗冻技术和漂洗工艺是保持冷冻水产品新鲜度、风味和防止其蛋白质冷冻变性的有效方法。

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There had been fears expressed, when licences were given out allowing clinics to keep frozen eggs, that women would freeze eggs when young and save them for use at the end of their career.

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To keep things safely frozen, cooling systems have been installed in the ground.

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Private REITs keep their share prices frozen, meaning there's no possibility of appreciation.

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