如今电子产品大行其道，时尚瞬息万变，共同消费对于经济来说就是一种理想的风向标。
Collaborative consumption is an ideal signalling device for an economy based on electronic brands and ever-changing fashions.
活动星系核的光学谱变化与光变时标之间是否存在某种关系？
AGN changes in the optical spectra and light changes between standard Is there some relationship?
这些讨论表明，活动星系核的短时标光变特征对厚吸积盘模型提供了强有力的支持。
The conclusion is: the short term variability behavior provides a strong support to the thick accretion disk model of AGN.
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