Someone who is dispassionate is calm and reasonable, and not affected by emotions.
例句
We, as prosecutors, try to be dispassionate about the cases we bring...作为检察官,我们对经手的案件会尽力做到不偏不倚。He spoke in the flat, dispassionate tone of a lecturer.他以一个讲师般平板、不动感情的口吻说话。
英汉词典释义
adj.
公正的,不带偏见的
a dispassionate look at a problem对某个问题客观的研究
英英词典释义
Adjective
1. unaffected by strong emotion or prejudice;
"a journalist should be a dispassionate reporter of fact"