基本解释=National Aeronautics and Space Council 国家航空和航天委员会[美]同根派生 NASC相关词英汉例句NASC (National Aeronautics and Space Council) 国家航空和航天委员会MONOTONICITY OF A DEFAULT THEORY AND A NASC FOR ITS VALIDITY 缺省理论的单调性及其充要条件NASC更多例句