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heliometer是什么意思

heliometer

美[ˌhiːliː'ɒmɪtə]  英[hiːlɪ'ɒmɪtə]
n.  太阳仪
  形容词:heliometric  副词:heliometrically  名词:heliometry

英英释义

Noun
  1. an instrument used to measure the angular separation of two stars that are too far apart to be included in the field of view of an ordinary telescope
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