unprecedented event etc have no predecessors no ancients in the past have done without parallel in history
have no predecessors
without parallel in history
前无古人，后无来者用英文怎么说
前无畏舰用英文怎么说
前日用英文怎么说
前日封用英文怎么说
前星系用英文怎么说
英语词典收录了最新的汉英词典和英汉词典，总共有200多万个词条，词库仍在不断更新中。
