The structural properties of these objects are investigated in the study of groups, rings, fields and other abstract systems, which are themselves such objects.

这些对象的结构性能进行了研究的群，环，域和其他抽象的系统，其本身这样的对象的研究。

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The most important of these are rings, and fields.

其中最重要的是戒指，和领域。

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Weedy roadsides were like museums and the fields of corn and beans around us were like circuses with many rings.

杂草丛生的路边就像一座座博物馆，而我们周围的玉米地和大豆田就像拥有很多圆形场地的马戏场。

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The radiation belt, which contains "two concentric rings of charged particles trapped by Earth's magnetic fields" doesn't affect current astronauts going to and from space because they are moving too fast to be hit by the radiation.

ENGADGET: Space elevator ride may kill humans due to ionizing radiation