英语词汇“BY Dra star”的翻译、意思、用法、释义-英汉汉英双解词典

词汇	BY Dra star
释义	BY Dra star 天龙BY型星；光谱型为K和M的带发射线的矮星；有准周期光变；光变幅小于 0.5目视星等；周期通常从短于1天至几天；光变曲线的形状在变化；表面有黑子活动。
随便看	air pollutant emission inventory air pollutant emission standard air pollution air air pollution alert Air pollution also harms plants and animals air pollution analysis air pollution analyzer air pollution and health hazard air pollution and prevention engineering Air pollution can travelgreat distances air pollution characteristic air pollution characteristics air pollution chemistry Air Pollution Code air pollution coefficient air pollution complaint air pollution concentration air pollution constrol technique air pollution contro commission air pollution control air-pollution control air pollution control act air pollution control activity Air Pollution Control Administration Air Pollution Control AdministrationAPCA