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航天学
研究航天基本原理和指导航天工程实践的综合性技术科学。又称宇宙航行学或宇航学。
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航天学,宇宙航空学,星际航空学
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cultivation of ratooning rice
cultivation regionalization
cultivation technique of double rows with a big ridge
cultivation theory
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cultural absolutism and cultural relativism
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cultural approach of social work
Cultural Assets Preservation Act from Taiwan
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Cultural Bitter Journey
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