"his ad-lib comments showed poor judgment"
"an extemporaneous piano recital"
"an extemporary lecture"
"an extempore skit"
"an impromptu speech"
"offhand excuses"
"trying to sound offhanded and reassuring"
"an off-the-cuff toast"
"a few unrehearsed comments"
"he spoke extemporaneously"
His extempore lectures on Gray were particularly successful.
出自: A. Thwaite
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海词词典,十七年品牌