单词	black swan
释义	black swanˌblack ˈswan (also ˌblack ˈswan eˌvent) noun [countable] an event that no one expects and that has a very great effect
随便看	spotty spousal spouse spout sprain sprang sprat Sprat, Jack sprawl sprawled sprawling spray spray can sprayer spray gun spray-on spray paint spray-paint spray tan spread spread bet spread betting spreadeagled spreadsheet spree

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