speed-limit

英 [s'piːdl'ɪmɪt] 美 [s'piːdl'ɪmɪt]

• n. 速度极限

英英释义

名词 speed limit:

1. regulation establishing the top speed permitted on a given road

例句

用作名词 (n.)

1. The speed of light turns out to be nature's speed limit.
   光速原来是自然界的速度极限。
2. You see, the existence of a natural speed limit for the motion of any object, or the sending of any signal, makes simultaneity in our ordinary sense of the word lose its meaning.
   你看，任何运动的物体或信号的发射都存在自然的速度极限，这使我们了解的词语的普通意思失去了意义。