信息安全领域中，有一个叫做“实际隐晦性（Practical Obscurity）”的概念。
It's the Full Moon tonight, and this month's is an extra special one, it's also a total lunar eclipse. This will turn the Moon a red color, earning it the nickname of "Blood Moon". Moon gazers in North America, parts of Asia, Australia, and the Pacific will be lucky enough to see this phenomenon, but for those elsewhere, it'll still be a big and bright moon with lots of features to spot on its surface. Keep reading to find out exactly what you can see.。业内人士推荐爱思助手下载最新版本作为进阶阅读
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"This decision isn't just about clocks, it's about quality of life for British Columbians."