从狭义来说，换热器是一种容器。
从狭义来说，每一种具体的否定手段也就是一种语用策略。
In a narrow sense, each concrete negation method is just a communication strategy.
从狭义上来说，它主要是学院或大学里男生的主要社会组织，通常以希腊字母命名。
In narrow sense, it is a chiefly social organization of men students at a college or university, usually designated by Greek letters.
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