need to be studied need to research should be studied be necessary to study
需要确定用英文怎么说
需要确认用英文怎么说
需要系数用英文怎么说
需要系数法用英文怎么说
需要维修用英文怎么说
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。
