单环，与群论中单群类相对应的基本环类一个环R，若只有平凡理想(即除R和零理想外不含其他理想)，则称R为弱单环或单纯环。
misc. monocyclic ring
... monocyclic orogenesis 单旋回造山运动 monocyclic ring 单环 monocyclic sulfide 单环硫化物 ...
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俄罗斯第一次发现这些单环把手铸铁球。
Russians first discovered these cast iron balls with single looped handles.
另两个为胸腺嘧啶和胞嘧啶，即称为嘧啶的单环结构。
The other two, thymine and cytosine, are single ring structures called pyrimidines.
将有一个“单环”档案，可以允许访问所有使用该档案的网站。
There will be some kind of "one ring" profile that will allow data pass through to the various places that use it.
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