分享的观念在幼儿教育中经常被强调。

The ___notion of sharing is often emphasized in early childhood education.

民主的观念起源于古希腊等古代文明。

The ___notion of democracy originated in ancient civilizations like Greece.

现代科学挑战了传统的宇宙观念。

Modern science challenges the traditional ___notion of the universe.