相关单词近义词 offhand 即时的, offhandedly 立即地, ad-lib 即兴演唱, impromptu 即席的, unrehearsed 未经排练的, extempore 即兴的, extemporaneous 即兴的, off-the-cuff 未预备的, extemporary 当场的临近词off, offkey 返回 offhanded