on paper

以书面形式, 从理论上说

例句与用法：

Could you put a few ideas down on paper?

把你的一些想法写出来可以吗?

Why don't you set your ideas down on paper?

你怎麽不把你的想法写在纸上呢?

It's a fine scheme on paper, but will it work in practice?

那计画不错，不过实践上是否可行？

He drew an oblique line on paper.

他在纸上划了一条斜线。

详细释义：

未经实践; 在理论上

It was just a scheme on paper.

那只不过是一个纸上计划。