Word · Frequency #1245
speed
速度；速率
核心释义
distance travelled per unit time; rate of motion
- 1.
快速移动的状态或快速运动的能力
The state of moving quickly or the capacity for rapid motion.
- 2.
单位时间内的行驶距离
distance travelled per unit time
- 3.
运动或行动的速度,特别是速度的大小；在给定时间内行进的距离速率
The rate of motion or action, specifically the magnitude of the velocity; the rate distance is traversed in a given time.
- 4.
某事发生的速度(通常很快)
a rate (usually rapid) at which something happens
- 5.
胶片、底片或传感器的感光度
The sensitivity to light of film, plates or sensor.
- 6.
快速改变位置
changing location rapidly
- 7.
曝光时间,相机快门打开的时间(快门速度)
The duration of exposure, the time during which a camera shutter is open (shutter speed).
- 8.
镜头可用的最大光圈大小
The largest size of the lens opening at which a lens can be used.
- 9.
焦距与摄影物镜直径之比。
The ratio of the focal length to the diameter of a photographic objective.
- 10.
衍生品价格敏感性的三阶度量,表示伽玛随标的资产价格变化的速率。
A third-order measure of derivative price sensitivity, expressed as the rate of change of gamma with respect to changes in the underlying asset price.
快速；迅速；速度；进度；感光度；快门速度；最大光圈；光圈值
用法In use
The train was travelling at full speed through the countryside.
用法提示：这里 speed 是名词，表示“速度”，用于 at full speed 短语中。
Could you check the speed of our internet connection? It feels slow today.
用法提示：speed 作名词，指“速率、速度”，这里指网速。
He reduced his speed when he saw the police car behind him.
用法提示：speed 是名词，表示“速度”，his speed 指他的行车速度。
the project advanced with gratifying speed
at ... speed
at 后接 high、full、top、low 等形容词，表示以某种速度行进；这种用法的 speed 前一般不加冠词。
The train was travelling at high speed.
火车正在高速行驶。
相关词与表达Connections
搭配Collocations
- high speed
- 高速
- The train travels at high speed.火车高速行驶。
- top speed
- 最高速度
- The car can reach a top speed of 200 mph.这辆车最高时速可达200英里。
- speed limit
- 速度限制
- You must obey the speed limit on the highway.你在高速公路上必须遵守速度限制。
- average speed
- 平均速度
- The average speed of the runner was 6 meters per second.跑步者的平均速度是每秒6米。
- pick up speed
- 加速
学习提示Learner notes
记忆技巧Memory Tip
speed 音似 '速度' 的 '速'，想象汽车加速时的速度感。
语境与语域Context & Register
通常用于物理、交通或日常对话中指物体移动的快慢程度，属于中性用法，在口语和书面语中都常见。
语法说明Grammar Note
表示速度的概念时通常不可数；表示具体速度时可数，常与 at 连用，如 at a speed of。
发音与拼写Pronunciation & Spelling
All listed words rhyme with "speed" (/spid/): they end in /-id/ with a long 'e' sound. No lookalikes that sound differently are included.
高价值词汇High-value vocabulary
该词属于 Oxford 核心词汇，值得优先掌握常见搭配和句型。
用法优先级Usage priority
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.