gū xuán ㄍㄨ ㄒㄨㄢˊ 孤悬（孤悬）
汉语里有孤悬主题吗？
提出了孤悬因子概念，并明确指出在数字签名设计中必须回避这一现象。
The authors introduce the concept of suspending-factor, and definitely point out that it must be avoided in designing signature schemes.
在孤悬于外好几十年之后，今日的莫斯科在许多外国人眼里就像一片未知领域。
After many decades of isolation, today Moscow may look like Terra Incognita for many foreigners.
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