Question

英语中speed 和 velocity 有什么区别的

Answer 1

在日常用语中，这两个词没有区别，可以通用。而在物理学里，velocity 是一个矢量(vector quantity)表示起点与终点间直线距离的长度除以所用时间所得的量，并注明方向：而 speed 是一个数量(scalar quantity)，是指起点到终点所走过的所有路程除以所用时间所得的量，且不标明方向。
拓展资料
velocity
noun
[U, C]
【不规则形式】 pl. -ies
1
(technical 术语) （沿某一方向的）速度
the speed of sth in a particular direction
the velocity of light
光速
to gain/lose velocity
加 / 减速
a high-velocity rifle
高速步枪
2
(formal) 高速；快速
high speed
Jaguars can move with an astonishing velocity.
美洲豹跑起来速度惊人。
speed
noun
运动 / 行动速率 rate of movement/action
1
[C, U] （运动的）速度，速率
the rate at which sb/sth moves or travels
He reduced speed and turned sharp left.
他减慢速度，向左急转。
The train began to pick up speed (= go faster) .
火车开始加速。
The car was gathering speed .
汽车逐渐加速。
a speed of 50 mph/80 kph
每小时50英里 / 80公里的速度
at high/low/full/top speed
以高 / 低 / 全 / 最高速
at breakneck speed (= fast in a way that is dangerous)
以不要命的速度
travelling at the speed of light/sound
以光速 / 音速行进
see also airspeed, ground speed
2
[C, U] （发生或进行的）速度；进度
the rate at which sth happens or is done
the processing speed of the computer
计算机的处理速度
This course is designed so that students can progress at their own speed.
这门课的设计思路是让学生自己掌握进度。
We aim to increase the speed of delivery (= how quickly goods are sent) .
我们力争提高送货速度。
3
[U] 快；迅速
the quality of being quick or rapid
The accident was due to excessive speed.
事故的原因在于速度过快。
She was overtaken by the speed of events (= things happened more quickly than she expected) .
事态发展迅速为她始料所不及。
(formal) A car flashed past them at speed (= fast) .
一辆汽车从他们身边疾驰而过。
摄影 in photography
4
[C] 感光度
a measurement of how sensitive film for cameras, etc. is to light
5
[C] 快门速度
the time taken by a camera shutter to open and close
shutter speeds
快门速度

Answer 2

我在别处找的,你看看
speed
[spi:d]
n.
速度,速率
Our speed averaged out at 50 km an hour.
我们的平均速度是每小时50公里.
快速,迅速
Everyone was surprised by the speed with which the dispute was settled.
每个人都为这一争端解决得如此之快而感到吃惊.
vt.& vi.
急行; 加速
He sped his car through the street.
他开车飞速地穿过街道.
vi.
超速行驶
Was I really speeding,officer?
警官,我真的超速行驶了吗?
用法词典
speed
来自古英语 sped >
同义词：velocity swiftness fastness speeding amphetamine pep pill upper rush hotfoot hasten hie race accelerate speed up quicken hurry zip
简明英汉词典
velocity
[viˈlɔsiti]
n.
速度
A bullet goes from this gun with a velocity of 3000 feet per second.
此枪射出的子弹,其速度为每秒3000英尺.
同义词：quickness speed swiftness