n. a part of a river where the current is very fast
s. done or occurring in a brief period of time
s. characterized by speed; moving with or capable of moving with high speed
a. 迅速的, 飞快的, 急促的, 陡的
n. 急流
1. The rapid growth of technology is changing our lives.
科技的快速发展正在改变我们的生活。
2. She made a rapid decision to accept the job offer.
她迅速决定接受这份工作邀请。
3. The train travels at a rapid speed, reaching the city in just an hour.
火车以快速的速度行驶，只需一个小时就能到达城市。