2019-2020学年人教版高中英语必修3课件:Unit 4 Astronomy the Science of the stars Period 1 课件(2)
2019-2020学年人教版高中英语必修3课件:Unit 4 Astronomy the Science of the stars Period 1 课件(2)第1页

Astronomy is the scientific study of the universe and the heaven bodies (such as the sun, the moon, and stars), gas, and dust within it.

astronomer


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