seriousadj.严肃的；严重的；认真的；危急的；庄重的serious threat严重威胁serious asthma五喘恶候seriously rich[inf] 极其富有的serious danger严重的危险serious defect严重缺陷Serious extent严重度serious affair大事, 正事, 严肃的事serious trauma严重创伤serious defeat严重的失败serious dry eye视频终端