progressive freezing的用法和樣例：
例句
- After embryo transfer, the pregnancy and lambing rates within vitrification group were higher than that of slow freezing group.
將冷凍解凍后的綿羊囊胚移植后，玻璃化冷凍組的懷孕率和產(chǎn)羔率明顯高于慢速冷凍法的。 - Extracting can also be done by partially freezing the salt solution.When this is done, the water freezes first, leaving the salts in the remaining unfrozen solution.
局部冷凍法是使鹽水部分冷凍，這時(shí)先行冷凍的是水，鹽則留在未曾凍結的液體中。
