英语词汇“mandatory level”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	mandatory level
释义	mandatory level mandatory level [′man·də‚tȯr·ē ′lev·əl] (meteorology) One of several constant-pressure levels in the atmosphere for which a complete evaluation of data from upper-air observations is required. Also known as mandatory surface.
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