speed 中文
EN
[spiːd] [-iːd] 
US 名快, 速率 动快行 维速率
- 速率是物理学中的一个基本概念，用来表示物体运动的快慢程度。
- 在日常生活中，速率常常和速度混用，但两者在物理学中对应着不同的概念。速率是一个标量，只有大小，没有方向。它的量纲是长度除以时间。速度的量纲和速率相同，但速度是有方向的向量。物体的瞬时速率等于瞬时速度的大小，而平均速率则不一定等于平均速度的大小。
- 国际单位制中，速率的單位為米每秒（m/s），但日常生活中較常用的單位是千米每小時（km/hr）或是英制系統下的英里每小時（mph）。海上船只或物体的行進速率，一般會使用節作為單位。
- 依照狭义相对论，能量或信息所能傳遞的最快速率為真空中的光速c = 299,792,458 米每秒，大約是1,079,000,000千米每小时或671,000,000英里每小時。静止质量不为零的物質要加速到此速率，需要無限大的能量。在相對論物理學中，會用快度來取代古典力學中的速度。
FR speed 
- 名词 (Noun)PLspeeds
- The state of moving quickly or the capacity for rapid motion; rapidity.
- How does Usain Bolt run at that speed?
- The rate of motion or action, specifically (mathematics)/(physics) the magnitude of the velocity; the rate distance is traversed in a given time.
- (photography) The sensitivity to light of film, plates or sensor.
- (photography) The duration of exposure, the time during which a camera shutter is open.
- (photography) The largest size of the lens opening at which a lens can be used.
- (photography) The ratio of the focal length to the diameter of a photographic objective.
- (slang, uncountable) Any amphetamine drug used as a stimulant, especially illegally, especially methamphetamine.
- (archaic) Luck, success, prosperity.
- The state of moving quickly or the capacity for rapid motion; rapidity.
- 动词 (Verb)SGspeedsPRspeedingPT, PPspedPT, PPspeeded
- (intransitive, archaic) To succeed; to prosper, be lucky.
- (transitive, archaic) To help someone, to give them fortune; to aid or favour.
- God speed, until we meet again.
- (intransitive) To go fast.
- The Ferrari was speeding along the road.
- (intransitive) To exceed the speed limit.
- Why do you speed when the road is so icy?
- (transitive) To increase the rate at which something occurs.
- (intransitive, slang) To be under the influence of stimulant drugs, especially amphetamines.
- (obsolete) To be expedient.
- (archaic) To hurry to destruction; to put an end to; to ruin.
- (archaic) To wish success or good fortune to, in any undertaking, especially in setting out upon a journey.
- To cause to make haste; to dispatch with celerity; to drive at full speed; hence, to hasten; to hurry.
- To hasten to a conclusion; to expedite.
- (intransitive, archaic) To succeed; to prosper, be lucky.
- 更多范例
- 用于句中
- I jumped in the car, and we sped off to the meeting.
- Such a progressive shift to prefrontally mediated executive processes may account for the increasing link between processing speed and myelin in anterior regions with advancing age.
- You shouldn't speed up your car when you go around corners.
- 用于句尾
- Defeat 12 months ago away to the same opponents signalled the end of John Toshack's reign as Wales manager, ushering in first caretaker Brian Flynn and then current boss Gary Speed.
- For example, the vehicle starts off in second gear or an upshift takes place at lower engine speeds.
- I bet the Jayhawk fast break could show up the Nimrod's lack of speed.
- 用于句中
Definition of speed in English Dictionary
- 词类阶层 (Part-of-Speech Hierarchy)
- 名词
- 可数名词
- 单数形态
- 不可数名词
- 不可数名词
- 可数名词
- 动词
- 不及物动词
- 及物动词
- 不及物动词
- 名词
资料来源: 维基词典
在语法上，这个单字"speed"是一个名词，更具体地来说，是一个可数名词和一个单数形态。它同时也是一个动词，更具体地来说，是一个不及物动词和一个及物动词。