| 词组 | speed |
| 释义 | speed Speed is used as a noun or a verb. ◊ used as a noun The speed of someone or something is the rate at which they move. Ralph increased his speed. ...the speed of light. Speed is often used in prepositional phrases beginning with at or with. You can say that someone or something moves at a particular speed. He goes on driving at the same speed. A point on Jupiter's equator moves at a speed of 12.7 kilometres per second. If you want to emphasize how fast something is moving, you can use at and an adjective in front of speed. I drove at great speed to West Bank. A plane flew low over the ship at lightning speed. If you want to emphasize how quickly something happens or is done, you use with and an adjective in front of speed. The shape of their bodies changes with astonishing speed. They have succeeded in expanding their industries with remarkable speed. ◊ used as a verb In stories, if someone speeds somewhere, they move or travel there quickly. When speed has this meaning, its past tense and past participle is sped. They sped along Main Street towards the highway. They drove through Port Philip and sped on down south. ◊ 'speed up' If something speeds up or if you speed it up, it moves, happens, or is done more quickly. They're way ahead of us. Speed up! The past tense and past participle of 'speed up' is speeded up. Tom speeded up and overtook them. The process is now being speeded up. |
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