慢速英语:中国科学家开发出延缓衰老的基因疗法

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gene therapy – science n. Gene therapy is an experimental technique that uses genes to treat or prevent disease.

grip – n. the act of grabbing or holding something

mammal – n. a type of animal that feeds milk to its young and that usually has hair or fur covering most of its skin

toxicity – medical n. the quality, state, or relative degree of being toxic or poisonous

primate – n. any member of the group of animals that includes human beings, apes, and monkeys