I. key [kiː] 名词
单语范例（未经PONS编辑处理）
He finds an airport locker key and assumes the money is hidden in the locker.
en.wikipedia.org If the exposition starts in a minor key, it typically modulates to the relative major key, or less commonly, the minor dominant.
en.wikipedia.org The ability to be creative, think on the fly and make key business decisions with little time amidst the tsunami of external information is vital.
www.huffingtonpost.com The composition of band was almost intact with the exception of a key element on drums.
en.wikipedia.org In chaos, none of the ringleaders thought of implementing the key item of the program: the overthrow of the government.
en.wikipedia.org