他的行为是出于权宜之计而非原则。
基于私利的依自身利害而定的，基于私利而非原则考虑的；自私自利。
Based on or marked by a concern for self-interest rather than principle; self-interested.
一项来自于中世纪决疑法，自下而上的研究方案指出，道德推理的核心是那些详尽描述的范例，而非原则。
On a "bottom up" alternative drawn from Medieval casuistry, it is richly described paradigm cases, not principles, that have the central role in moral reasoning.
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