时间是抽象的东西，我们只能凭脑子去想像它。

Time is abstract, which we can only imagine in our mind.

youdao

抽象名词就是能想象但是不能摸到的东西的名称。

Well, it's the name of a thing which you can think of but cannot touch.

youdao

数学上的抽象还是感性的东西，虽然是没有特定存在的抽象的感性东西。

But these are still the object of sense, although the sensible is abstract and idealised.

youdao

抽象名词就是你想象得到但触摸不到的东西。

It's the name of a thing which you can think of but cannot touch.

youdao

任何有形东西的背后必须是一个抽象的概念。

Behind any tangible thing must be an abstraction.

youdao

任何有形东西的背后必须是一个抽象的概念。

Behind any tangible thing must be an abstraction.

youdao