adj. 形容词快的，迅速的；头脑灵活的；系牢的；不掉色的
adv. 副词快速，立即；牢固地
v. 动词禁食，斋戒
n. 名词禁食期，斋戒期
He ran fast to catch the last bus home.
他跑得很快去赶最后一班回家的公交车。
The cheetah is known for its fast speed in the wild.
猎豹以其在野外的快速速度而闻名。
She finished her homework fast so she could watch TV.
她很快完成了作业，以便可以看电视。
The internet connection here is really fast and reliable.
这里的网络连接非常快而且可靠。
We need to act fast to solve this urgent problem.
我们需要快速行动来解决这个紧急问题。
The car moved fast down the empty highway.
汽车在空旷的高速公路上飞快行驶。
He learned to play the piano fast with daily practice.
通过每天练习，他很快学会了弹钢琴。
The athlete's fast recovery surprised the medical team.
运动员的迅速恢复让医疗团队感到惊讶。
She spoke so fast that I couldn't understand her.
她说得太快了，我听不懂她在说什么。
The technology is evolving fast, changing our lives daily.
技术快速发展，每天都在改变我们的生活。
fast lane 快车道
fast track 快速通道
fast asleep 熟睡
fast forward 快进
fast friend 挚友
fast pace 快节奏
第三人称单数: fasts;
过去式: fasted;
过去分词: fasted;
现在分词: fasting;
比较级: faster;
最高级: fastest;
