英语词汇“extant”的意思、用法、释义、翻译、读音、例句、短语、词组-英汉汉英翻译词典

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单词	extant
释义	US
随便看	relay regulator relay repair relay reservoir relay satellite relay satellite relay selecting circuit relay selector relay selsyn motor relay semiautomatic block relay sequence relay servo relay servomechanism relay set relay shelf relay shock absorber relay shutter relay spring relay station relay station relay station relay station relay stick relay storage relay switch relay switchboard