adj.权宜的；有用的
n.权宜之计；临时手段
Einstein found it expedient to use in the creation of his theories. 爱因斯坦发现这种本性在他理论的创建中是有用的。
It was expedient to retire gracefully. 体面的让步可算是权宜之计。
adv.方便地；权宜地
adj.不适当的；不明智的
