慢速英语:科学家首次在实验室培育出完全成熟的人类卵子

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maturity – n. the state of being fully developed in the body or the mind

journal – n. a magazine that reports on things of special interest to a particular group of people

ovaries – n. the organs in women and female animals that produce eggs and female hormones

scope – n. space or opportunity for action and thought

fertility – n. the ability to produce young

optimizing – v. making something as good or as effective as possible

sperm – n. a cell that is produced by the male sexual organs and that combines with the female's egg in reproduction

technique – n. a way of doing something by using special knowledge or skill

ascertain – v. to learn or find out something, such as information or the truth

chemotherapy – n. the use of chemicals to treat or control a disease, such as cancer