The idea of progress forms the backdrop to a society.

关于进步的观念形成了一个社会的大背景。

youdao

Geometry - the idea of ideal forms existing outside the physical world.

几何学——存在于物质世界之外的理想形式的概念。

youdao

Geometry - the idea of ideal forms existing outside the physical world.

几何学——存在于物质世界之外的理想形式的概念。

youdao