原理上，我们可以通过观测所谓的标准烛光(一种天体，它的绝对光度是相同的)来追溯宇宙内的历史。
In principle, one can trace that history back in cosmic time by observing a so-called standard candle, a class of astronomical object whose intrinsic luminosity is uniform.
因此，它们在性质上的唯一区别应该可通过观测两种香芹酮的气味和旋光仪中旋光度的符号而得知。
Hence, the only difference in properties one should observe for the two carvones are the odors and the signs of rotation in a polarimeter.
综述了从射电波段到X 射线波段星暴星系的光度和光谱观测特征及其研究的最新进展。
Then, we briefly summarize the photometric and spectral observation properties (from radio to X-ray), and the latest progress of starburst galaxies.
本文中我们利用盘不稳定模型和星爆模型的基本思想，模拟活动星系核在光学波段的光度和光谱斜率变化，并将模拟的结果和观测进行比较。
In this paper, using disk-instability model and starburst model, the AGN optical variability and spectral slope variability are simulated and confronted with observations.
主要观测指标：紫外分光光度计检测吸光率（A值）及纯度、琼脂糖凝胶电泳、目的基因测序。
MAIN OUTCOME MEASURES:Ultraviolet spectrophotometer absorbance (A) and purity, agaroses gel electrophoresis, and objective gene sequencing.
本文给出了北师大，云南天文台和华北光电所共同研制的近红外光度计在云台1米望远镜上试观测的结果和一些初步分析。
The test observations and initial analysis of a near infrared photometer used with the 1 -meter reflecting telescope at Yunnan Observatory are given.
除空白组外，余组造模后并分别给药，疗程15 d。观测大鼠鼻部症状并计分，检测血中组胺吸光度。
The nasal symptoms of rats were observed, the accumulative scores of nasal symptoms were calculated and the histamine content in blood were determined.
利用积分浑浊度仪监测得到的散射系数和多波段光度计观测资料分析了兰州冬季大气气溶胶的一个个例的散射光学特征。
The scattering optical characteristics of aerosol over Lanzhou in winter are analyzed, using the data monitored by Integrating Nephelometer and Multi-wavelength Sun-photometer.
该仪器与一台美国NASA主持的国际气溶胶观测网仪器CIMELCE-318太阳光度计进行对比观测，二者所得结果一致性较好。
A sun photometer CIMEL CE-318 in AERONET (owned by US NASA/GSFC) was operated under same conditions to compare with MORSAS. The observed results are consistent very well each other.
该仪器与一台美国NASA主持的国际气溶胶观测网仪器CIMELCE-318太阳光度计进行对比观测，二者所得结果一致性较好。
A sun photometer CIMEL CE-318 in AERONET (owned by US NASA/GSFC) was operated under same conditions to compare with MORSAS. The observed results are consistent very well each other.
应用推荐