[jí xí]
(当座; 当场) impromptu; extemporaneous; extempore; off the cuff; offhand
make an extemporaneous speech; give an offhand talk; give a talk offhand
即席发言
off-the-cuff remarks
即席讲话
decide at the spot
即席决议
(就座入席) take one's seat (at a dinner table, etc.)