数环（number ring） 数环定义 设S是复数集的非空子集。如果S中的数对任意两个数的和、差、积仍属于S，则称S是一个数环。
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... Masyu No-touch 无缘黑白珍珠 Number Ring 数字回路 Myopia 最近线段 ...
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... 字码管 character-display tube; charactron 字码轮 number ring 字码锁 combination lock ...
integral number ring 整数环
invariant basis number ring 不变基数环
Ring Index Number 环系索引号
Ring Number 环路号码
Ring this number 打这个电话号码
difference in ring number 环数差
differences in ring number 环数差
ring-number distribution 环烷烃环数分布
number of arch ring 拱圈层数
number ring
数字环
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The large number of volcanoes around the Pacific plate has earned the name "Ring of Fire."
VOA: special.2010.01.12
While a landline can call a Google Voice number and ring on your PC, the tablet cannot be called in like manner.
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So for example, you would be able to get a phone call on one number and have it ring only on your work number at certain times but your Skype number at other times.
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Someone can call your USA number and it will ring right there on your Pocket PC.
ENGADGET: How-To: Use a Pocket PC PDA as a WiFiphone
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