单词	oxygen debt
释义	oxygen debtˈoxygen ˌdebt noun [uncountable] a temporary medical condition in which not enough oxygen is going to the muscles in your body, caused by doing physical exercise that takes a lot of strength or effort
随便看	frisson Frito-Lay Fritos fritter fritz frivolity frivolous frivolously frizz frizzy fro frock frock coat Frodo frog frogman frogmarch Frog Prince, The frogspawn froideur frolic from fromage frais frond front

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