一个细胞表面有多个球菌的概念性视图。
A conceptual visualisation of multiple coccus bacteria on a cellular surface.
一步一个脚印。在登月这件事情上，这一步留下的印象和留在月球表面实实在在的印记，都时常在电视图像和广播录音中被提及。
A step leaves an impression; in this case, it is an oft-repeated television image or a radio recording - as well as a concrete impression on the surface of the moon.
运作视图(OV)着重于主题系统的表面上可见的结构和行为。
The Operational View (OV) focuses on the externally visible structure and behavior of the subject system.
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