VOA慢速英语:谷歌新的Nest Hub智能音箱使用雷达监视你的睡眠

track –v. to watch or follow the progress of (someone or something)

snore –v. to breathe noisily while sleeping

wrist –n. the part of the body where the hands join the arms

digital –adj. using or characterized by computer technology

privacy –n. the state of being away from public attention: not public

monetize –v. to change something so that money can be made from it