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IELTS BNC: 1245 COCA: 1390

speed

1 speed /ˈspiːd/ noun
plural speeds
1 speed
/ˈspiːd/
noun
plural speeds
Learner's definition of SPEED
: the rate at which someone or something moves or travels(运动)速度
[noncount]
[count]
: the rate at which something happens or is done(某事发生或进行的)速度
[noncount]
[count]
[noncount] : the quality of being quick快;迅速
[count] photography
: a measurement that indicates how quickly film reacts to light and that is expressed as a number (such as 100 or 200)曝光率;感光度
: the time during which a camera's shutter is open(相机)快门速度
[count] : a gear in a vehicle or bicycle(汽车或自行车等的)排挡,变速器
[noncount] informal : an illegal drug that makes a person feel more excited and full of energy苯丙胺,安非他明(一种兴奋剂)

at speed

chiefly British
: very quickly : at a fast speed迅速地;高速地

full speed ahead

see 1full

up to speed

: having the latest information about something了解最新情况的
: having the knowledge that is needed to do or understand something掌握所需信息的
2 speed /ˈspiːd/ verb
speeds; sped /ˈspɛd/ or speeded; speeding
2 speed
/ˈspiːd/
verb
speeds; sped /ˈspɛd/ or speeded; speeding
Learner's definition of SPEED
always followed by an adverb or preposition, [no object] : to move fast快速移动
always followed by an adverb or preposition, [+ object] : to move (someone or something) somewhere very quickly快速运送
[no object] : to drive faster than the legal speed limit超速驾驶
[+ object] somewhat formal : to cause (an action, movement, process, etc.) to happen faster使加速;促进

speed up

[phrasal verb]
speed up or speed up (something or someone) or speed (something or someone) up
: to become faster or to make (something or someone) faster(使)加速
see also speedup

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