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Helix Nebula
释义
Helix Nebula
Encyclopedia
理学
行星状星云
释
Helix Nebula
螺旋星云
位于宝瓶座,标准历元J2000的赤经22h29m38.54s,赤纬-20°50′13.64″的行星状星云。《星云星团新总表》中的编号为NGC7293,是离地球最近最明亮的行星状星云。
Astronomy
Helix Nebula
螺旋星云
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energy band gap
energy band of semiconducter
energy band of semiconductor
energy band structure
energy-band structure
[energy] band theory
energy band theory
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energy budget equation
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energy carrier
energy cascade effect of turbulence
Energy Charter Treaty
energy chemistry
energy circuit
energy condition
energy conditions
energy confinement
energy confinement time
energy conservation
energy conservation design standard for new heating residential buildings
energy conservation engineering in rural areas
energy conservation equation
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