详细解释:a. 迅速的, 飞快的, 急促的, 陡的
n. 急流
【经】 快的, 迅速的
词型变化：
副词:rapidly名词:rapidity形容词比较级:rapider最高级:rapidest英语解释：
名词 rapid:
a part of a river where the current is very fast形容词 rapid:
done or occurring in a brief period of timecharacterized by speed; moving with or capable of moving with high speed同义词：speedy