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astronomical clocktower
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astronomical clocktower
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历史学
科学技术
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astronomical clocktower
假天仪
中国北宋苏颂受到浑仪小样的启发,提出制作思路,韩公廉推算设计,历时数年做成的天体演示仪器,即后来所谓天象仪的先祖。
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diatom analysis
diatomic
diatomic gas
diatomic molecule
diatomics
diatomite
diatomite adsorbents
diatom ooze
diatoxanthin
diauxic growth
diaxial addition
diaxiality
diazacyclobutadiene
diazacyclobutadiene; diqzete
diazacycloheptatriene
diazacycloheptatriene; diazpine
diazenyl radical
diazepine
diazinon
diaziridine
diazirine
diazo
diazoalkane
diazoamino compound
diazo compound
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