慢速英语:每天早上什么东西把你叫醒？

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alarm – n. a device that makes a loud sound as a warning or signal

shake off – v. an act of getting rid of something unpleasant or unwanted

grogginess – adj. not able to think or move normally because of being tired, sick

alert – adj. able to think clearly and to notice things

harsh – adj. unpleasant and difficult to accept or experience

tone – n. the quality of a sound produced by a musical instrument or singing voice

hum – v. to make a low continuous sound