selective freezing

例句：

1. 1. The process of selective freezing is crucial in the preservation of delicate biological specimens.
   选择性冷冻过程在保存珍贵生物标本中至关重要。
2. 2. During the winter season, many animals undergo selective freezing to survive in colder temperatures.
   冬季，许多动物会经历选择性冷冻以适应更冷的温度。
3. 3.The selective freezing technique has been used to preserve ancient DNA samples for future research.
   选择性冷冻技术已被用于保存古代DNA样本，供未来研究使用。