n.便利；權宜之計；私利

=expediency.

Doing so sends a dangerous signal that moral arguments have no role in shaping the climate regime and that national expedience will regularly trump global deals. 這樣做發(fā)出了一個危險的信號，即道德論據(jù)在塑造氣候制度方面無法發(fā)揮任何作用，國家便利通常會打敗全球協(xié)議。

The expedience of war opened the doors to American drug traffic and Mafia domination. 戰(zhàn)爭的私利就是給美軍的毒品交易和黑手黨的同志打開大門。