n.制冷剂，冷冻剂，冷却剂...

The laws and facts of cryogen creep of metal materials have been discussed.讨论了金属材料的低温蠕变现象和规律....

cryogen的音标：cryogen的英式发音音标为：['kraɪədʒən]cryogen的美式发音音标为：['kraɪədʒən]...