“Ursa Major”的概念、定义、翻译、参考文献-科学参考

单词	Ursa Major
释义	Ursa Major [`ǝr·sǝ `mā·jǝr] ^ASTRONOMY A northern constellation, right ascension 11 hours, declination 50°N; it contains a group of seven stars known as the Big Dipper.
随便看	Ptilodontoidea ptilolite Ptinidae PTM Ptolemaic system Ptolemy's theorem ptosis PTRM ptyalase ptyalin Ptychodactiaria Ptychomniaceae ptychotis oil Ptyctodontida ptygma ptygmatic fold p-type conductivity p-type crystal rectifier p+-type semiconductor p-type semiconductor p-type silicon Pu puberty puberulic acid pubic arch

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