光变周期的英文

• period of light variation

• "光"英文翻译    light; ray
• "变"英文翻译    become different; change
• "周期"英文翻译    period; cycle; circle; revol ...
• "变周期加载" 英文翻译 :    variable-cycle loading
• "变周期运行" 英文翻译 :    variable cycle operation
• "磁变周期" 英文翻译 :    magnetic period
• "交变周期" 英文翻译 :    period of alternation
• "交变周期数" 英文翻译 :    alternation number
• "可变周期" 英文翻译 :    variable cycle
• "衰变周期" 英文翻译 :    decay period
• "瞬变周期" 英文翻译 :    transient period
• "蜕变周期" 英文翻译 :    decay period; decaying period
• "温变周期" 英文翻译 :    thermoperiod
• "形变周期" 英文翻译 :    deformation period
• "可变周期操作" 英文翻译 :    variable cycle operation; variable-cycle operation
• "放射性衰变周期" 英文翻译 :    radioactive decay period; radioactive-decay period
• "光变幅" 英文翻译 :    range of light-variation
• "单色光变幅" 英文翻译 :    monochromatic amplitude
• "灯光变化" 英文翻译 :    lighting change
• "电光变换器" 英文翻译 :    electrical optical converter; electro-optic tra ducer; electro-optic transducer; electro-optical converter
• "光变方程" 英文翻译 :    light equation
• "光变换特性" 英文翻译 :    optical transform property
• "光变曲线" 英文翻译 :    light curve; light-curve
• "光变色玻璃" 英文翻译 :    photochromic glass
• "光变色体" 英文翻译 :    phototropic body

• Well , you may ask : how can we determine the luminosity - period relation
  但你可能会问：我们怎样得知造父变星的光变周期光度关系？
• Their periods , in the range of a few days to a few months , have a definite relation with the luminosities
  最特别的是，它们的光变周期和光度有直接的关系，周期越长，亮度越大。
• Subsequently astronomers found more and more cepheids in different corners of the universe and discovered that there exists a simple relationship between their luminosities and light variation periods
  其后的天文学家在宇宙不同角落陆续找到其他造父变星，并发现了它们光度跟光变周期间的简单关系。
• This usually means that we find out the relation using stars near us , then apply the relation to greater distances . in general , we use accurately determined distance indicators for small distance to calibrate distance indicators for greater distances
  事实上，科学家首先找一些离我们较近的造父变星，找出它们的光变周期与光度的关系，然后假设这个关系对遥远的同类变星依然适用。
• We have to use some other methods to measure the luminosity or equivalently the absolute magnitude of the cepheid variable . since we can readily measure the apparent magnitude of a cepheid variable , to measure the luminosity means measuring the distance . we use some distance measurement methods , for example , parallax , to determine the relation
  要弄清这个关系，我们要知道不同造父变星的光度和光变周期数据，量度光变周期当然不是问题，但要得知一颗恒星的光度，我们首先要得知它的距离，这时便须借助好像视差法等其他量度天体距离的方法。