单词	swordtail
释义	swordtail noun sword·​tail ˈsȯrd-ˌtāl  : a small brightly marked Central American live-bearer (Xiphophorus helleri of the family Poeciliidae) often kept in tropical aquariums and bred in many colors Word History First Known Use 1858, in the meaning defined above
随便看	underinvestments underivable underivative underived underjaw underjawed underjaws underkeeper underkill underkingdoms underkings underlaid underlain underlains underlap underlapped underlapping underlaps underlay underlayer underlayers underlaying underlayment underlayments underlays

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