ex·tem·po·re
adjective/ɪkˈstempəri/
/ɪkˈstempəri/
(formal)- spoken or done without any previous thought or preparation
（讲话或行动）即兴的，无准备的 - an extempore speech
即席讲话
Word Originmid 16th cent.: from Latin ex tempore ‘on the spur of the moment’ (literally ‘out of the time’). - an extempore speech