“spiral arms”的概念、定义、翻译、参考文献-科学参考

单词	spiral arms
释义	spiral arms [`spī·rǝl `ärmz] ^ASTRONOMY The shape of sections of certain galaxies called spirals; these sections are two so-called arms composed of stars, dust, and gas extending from the center of the galaxy and coiled about it.
随便看	lateral moraine lateral observation lateral parity check lateral planation lateral pointing correction lateral quadrupole lateral recording lateral root lateral sclerosis lateral search lateral secretion lateral separation lateral sewer lateral shear interferometer lateral support lateral system lateral ventricle laterite lateritic soil laterization laterlog late-type star latewood latex latex cell

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