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VOA慢速英语:美国测试更健康的新避孕药
2019-09-22来源:和谐英语
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dose –n. an amount of medicine or vitamin taken at one time
in practice –idiom what actually happens rather than what is supposed to happen
vulnerable –adj. more easily hurt or harmed
consistent –adj. behaving or acting in, more or less, the same way
maintain –v. to continue having or doing (something)