英语词汇“pilot balloon”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-现代词典

单词	pilot balloon
释义	pilot balloon a balloon for the visual observation of upper-atmosphere wind currents. [1840-50]
随便看	infimum infin. infinite infinite baffle infinite decimal infinite integral infinite product infinite regress infinite series infinitesimal infinitesimal calculus infinitival infinitive infinitive clause infinitize infinitude infinity infirm infirmarian infirmary infirmity infix infl. in flagrante delicto inflame

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