upper and lower英语标准发音：upper and lower英式发音：美式发音：翻译中文上下upper and lower - 基本释义[词典1]上下级上和下upper and lower - WEB词典Upper and lower上下级上部和下部上上及下upper stenosis and lower stenosis上膈下膈upper r and lower bound上下界 参考资料： 1.百度翻译：upper and lower2.有道词典：upper and lower3.爱词霸：upper and lower
