blackface

A case might be made for the blackface minstrel show, vaudeville, or for the entertainments of some medicine shows, camivals, and riverboats as American folk drama.

滑稽说唱团演(扮演黑)、杂耍演，些娱乐性的药品巡回演、表演会与内河游艺船等，均可作为美国民间戏剧的例证。

While this is occurring an unfertilized egg cell is taken from a Blackface ewe with its DNA filled nucleus taken out leaving a nucleus free egg cell that will later produce an embryo (3).

（接着如果把它）放在个细胞核已去除的黑面母羊的的营养细胞中，它会儿就会产生个胚芽。