A number of variations of this belief exist, but the common core of it is that many of those who led the world have been replaced by extraterrestrials.

这种信念存在多种变体，但其共同核心是许多领导世界的人已被外星人取代。

In 2010, it was left out of the national common core education and standards, which are a set of learning goals that help teachers prepare students for college and future careers.

2010年，它被排除在国家共同核心教育和标准之外，这是一套学习目标，帮助教师为学生上大学和未来的职业生涯做好准备。