The track it creates is called the path of annularity.

它产生的路径被称作环食带。

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The longest duration of the annularity on China's territory would be 8 minutes and 17 seconds in Ruili, Yunan Province, Cheng said.

程卓称中国本土最长的日环食将在云南省瑞利发生，时长8分17秒。

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An approach of mapped with bipolar coordinate and reduce noisy is used to normalize iris image in this paper, and annularity image with different centre is mapped onto bipolar coordinate efficiently.

本文介绍了一种用双极坐标映射和降噪的方法对虹膜图像进行归一化，可以有效的将不同心的环形图像映射到双极坐标系上。

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The crescent was so thin, we could imagine what annularity was like easily even if we didn't see it.

BBC: Skywatchers see 'ring of fire'

In the end we made a last minute dash from the thick fog of Nairn to Burghead and got an amazingly clear view from a minute after annularity to the end.

BBC: Skywatchers see 'ring of fire'