这些不可见，定义模糊的东西，不能被划入严谨的科学范畴里。

These invisible, vague things can never form the basis of a serious science.

youdao

首先探讨并明晰了冻融侵蚀的定义与研究范畴。

First, the research category of freeze-thaw is discussed and its definition is crystallized.

youdao

首先探讨并明晰了冻融侵蚀的定义与研究范畴。

First, the research category of freeze-thaw is discussed and its definition is crystallized.

youdao