通常这些细胞被放在富含营养的培养基上并在冷冻前进行复制。
Normally these cells would be placed in nutrient-rich cultures and be replicated before freezing.
研究人员不知道他们的青蛙细胞能存活多长时间，所以他们决定马上冷冻他们。
The researchers had no idea how long their frog cells would last and so decided to freeze them at once.
球员将孩子脐带血中的干细胞冷冻，以便今后可以用于治愈软骨和韧带疾病。
Players are freezing the cells taken from the umbilical cord blood of their babies as a possible future cure for cartilage and ligament problems.
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