Expediency means doing what is convenient rather than what is morally right.
例句
It seems political expediency, rather than absolute economic need, will determine who gains from the conflict...看来是政治上的权宜之计,而不是绝对的经济需求,将决定谁会从这场冲突中获益。This was a matter less of morals than of expediency.此举只是权宜之计,不关乎道德问题。
英汉词典释义
n.
利己;权术;权宜之计
The government is torn between principle and expediency.政府在原则与权宜之间难于抉择。