英语词汇upper polar怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	upper polar
释义	upper polar 简明释义上极网络释义短语 1 polar upper atmosphere 极区高层大气双语例句 1 The upper timberline, like the snow line, is highest in the tropic and lowest in the polar regions. 上行树带界线，比如雪线，在热带最高在极地最低。
随便看	bloodletter bloodletter bloodletter blood letting blood-letting bloodletting bloodletting instrument blood letting instrument blood letting needle bloodletting blood-letting therapy blood letting therapy bloodletting therapy blood level blood level controller blood level detector blood level measuring electrode blood libel blood libel bloodlike bloodlike blood lily blood lily blood line blood line

英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。