“practical astronomy”的概念、定义、翻译、参考文献-科学参考

单词	practical astronomy
释义	practical astronomy [`prak·ti·kǝl ǝ`strän·ǝ·mē] ^ASTRONOMY That part of astronomy concerned with the use of information acquired by an observer in the solution of problems determining latitude and longitude on sea or land and directions on the earth's surface by the help of celestial objects.
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