extempore
adj, adv (spoken or done) without previous thought or preparation; impromptu 无准备的; 即席的
an extempore speech 即席讲话
speak extempore, ie without notes 即席发言.
🗣️ 情景例句
Neither.
都不是。
I will take an elevator.
我将去搭电梯。
But suppose the earth could be covered with sensors spaced one foot apart,