VOA慢速英语:健康的儿童如果不能正常成长可能会缺乏这东西

prior – adj. existing earlier in time

endocrinology – n. a branch of medicine concerned with the structure, function, and disorders of the endocrine glands

deficiency – n. a lack of something that is needed : the state of not having enough of something necessary

puberty – n. the period of life when a person's sexual organs mature and he or she becomes able to have children

distribution – n. the act of giving or delivering something to people

pea – n. a small, round, green seed that is eaten as a vegetable and that is formed in a seed case (called a pod) of a climbing plant; also : a plant that produces peas

mutation – n. a change in a gene or the resulting new trait it produces in an individual

womb – n. uterus