Visual acuity indicates the angular size of the smallest detail a person's visual system can resolve.

视觉灵敏度指出了人类视觉系统所能分辨的最小细节角度。

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The combination of very large radio flux and exceedingly small angular size means that the sources have a fantastic surface brightness.

极大的射电流量同极小的角经集于一身，意味着这些发射源有难以置信的高表面亮度。

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Results The gastric ulcer, nb angular ulcer, sinus ulcer and big size ulcer were common and the symptoms were often untypical in the elderly.

结果老年消化性溃疡中以胃溃疡较多，且以胃角溃疡、胃窦溃疡及较大溃疡多见，但症状多不典型。

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One of the ways scientists study the CMB is by subjecting the warm and cold spots in the radiation to a detailed statistical analysis, examining the deviations in temperature as a function of their size on the sky - their angular scale.

BBC: The first fractions of a second after the Big Bang