单词	what-if
释义	what-ifˈwhat-if noun [countable usually plural] informal something that could happen in the future or could have happened in the past:  If I thought about all of the what-ifs in my life, I would go crazy.
随便看	oligarch oligarchic oligarchy oligopoly O Little Town of Bethlehem olive olive oil Oliver, Jamie Oliver Twist Olives, the Mount of Olivier, Laurence ollie -ological -ologically -ologist -ology Olsen twins Olympia Olympiad Olympian Olympic Olympic Games OM Omagh Oman

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