several decades several tens of years
several decades
几十米用英文怎么说
几千用英文怎么说
几千万用英文怎么说
几千个用英文怎么说
几千元用英文怎么说
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。
