It's taken from the inside of the furnace, and shows plasma - gas heated to about 1,000C - glowing brightly.
ВсеПолитикаОбществоПроисшествияКонфликтыПреступность。业内人士推荐safew官方下载作为进阶阅读
arXiv:2602.18602v1 [cs.PL] for this version)，更多细节参见WPS官方版本下载
公式： f(x)=tanh(x)=ex−e−xex+e−x。同城约会是该领域的重要参考