zip disk
极限飞碟 Ultimate Frisbee
麦景图终极试音天碟 McIntosh Demonstration Reference Disc
碟形电极 dished electrode
中间是明亮的星云，一个极薄的碟状物，从我们这个非常的视点看着像一条直线。
The bright nucleus can be seen at the centre, along with the very thin disc that looks like a straight line from our unusual viewing position.
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