The rate at which someone or something moves or happens.
速度;速率
02 · WORD LINKS
fastquickrapidvelocity
✦ AI INTRODUCTION 学习难度
Speed tells us how fast something moves. A racing car has high speed, while a walking turtle has low speed. We can also use “speed up” when something begins to move faster.
03 · USE IT
Cars should not drive at high speed in the city.
The runner increased her speed near the finish line.
04 · YOUR TURN
What is the fastest thing you know? Use “speed” in your answer.