octogenarian的复数形式怎么拼写？

She is very active for an octogenarian.她已经是八旬老人了,还很精神.She is a very active octogenarian.她已经是八旬老人了，还很精神。...

octogenarian的音标：octogenarian的英式发音音标为：[ˌɒktədʒə'neəriən]octogenarian的美式发音音标为：[ˌɑktədʒə'neriən]...

n.80到89岁的人...

v.使（某人）困惑不解，使迷惑( mystify的第三人称单数 )...

isolative的音标：isolative的英式发音音标为：['aɪsleɪtɪv]isolative的美式发音音标为：['aɪsleɪtɪv]...

His astrut walk gained the attention of everyone.他那趾高气扬的走路,引起每个人的注意....

n.商人，批发商，店主，零售商adj.商人的，商业的...

“为什么”的英语可以翻译为：why，why is it that，how is it that，forwhy，whereto ...

There's no telling how long the talks could drag on.谁也说不准谈判还会拖多久。It is an open question how long that commitment can last.这一承诺能维持多久还不确定。How long he'll be able to do so is a moot point.不知道他还能这样做多久。...

v.昏暗( gloom的过去式和过去分词 )，阴暗，忧郁，沮丧...

这些良好感觉只不过是婉辞下偏离真实的备用品.Those fine feelings were spared from reality by careful euphemisms....

He felt tiny bits of grit and sand peppering his knees.他感到细小的沙砾不断打在膝盖上。...

n.混乱( disorder的名词复数 )，凌乱，骚乱，（身心、机能）失调...

“立柱”的英语可以翻译为：upright column，crutch，upright post，frame ...

“疏苗机”的英语可以翻译为：gapper ...

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“发射器”的英语可以翻译为：ejector，emitter，projector，launche...

巨杆菌素...