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1. The astronomer uses a telescope to observe the sun and its planets.
天文学家使用望远镜来观察太阳及其行星。
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2. The astronaut was testing the new solar system model in space.
宇航员正在太空测试新的太阳系模型。
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3. The stargazers gathered around the solar system exhibit at the museum.
星星爱好者聚集在博物馆的太阳系展览周围。