慢速英语:Clinton Cancels Campaign Trip Because of Sickness(翻译)

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stumble – v. to hit your foot on something when you are walking or running so that you fall or almost fall

diagnosis – n. the act of identifying a disease, illness or medical problem

dehydrated – adj. lacking enough water

specific – adj. clear and exact

concussion – n. a brain injury resulting from a hard hit to the head