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沙漏星云
释义
沙漏星云
Encyclopedia
理学
行星状星云
释
Engraved Hourglass Nebula
沙漏星云
位于苍蝇座,标准历元J2000的赤经13h39m35.07s,赤纬-67°22′51.74″的年轻行星状星云。因其形状像西方记录时间的沙漏而得名。又称MyCn18。
Astronomy
Hourglass Nebula
沙漏星云
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Rural information infrastructure
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rurality
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Rural land contract
Rural Land Contract Law
rural land contract right
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rural land reform
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rural landscape planning and design
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