expediency

n. 方便，权宜之计

expansionism, expansionist, expansive, expansively, expansiveness, expatiate, expatriate, expect, expect of, expect sth. of sb., expectancy, expectant, expectant mother, expectantly, expectation, expectation of life, expected, expectorant, expectorate, expedience, expedient, expediently, expedite, expedition, expeditionary, expeditious, expeditiously, expel, expend, expendable, expenditure, expense, expense account, expensive, expensively, experience, experienced, experiential, experiment, experimental,