单词 | speed |
释义 | noun | verb speedspeed1 /spid/ ●●● S2 W2 noun 1HOW FAST something MOVES [countable, uncountable] how fast something moves or travels: average wind speedspeed of the speed of light The train can travel at a speed of 110 mph. The ferry has a top speed of (=the fastest it can possibly go is) 25 mph.at full/top speed He came running toward me at full speed.at high/low speed The car drove off at high speed. We raced down the mountain at breakneck speed (=dangerously fast). The rocks began to gather speed (=gradually start to travel faster) as they tumbled down the hillside.2HOW FAST something HAPPENS [uncountable] how fast something happens or is done: the computer’s data transmission speedspeed of the speed of change in the region They’re putting up new houses at lightning speed.3FAST [uncountable] the quality of moving or doing something fast: A good player needs strength and speed. They acted with speed and efficiency.4DRUG [uncountable] slang an illegal drug that makes you very active SYN amphetamine5PHOTOGRAPHY [countable] a)the degree to which photographic film is sensitive to light b)the time it takes for a camera shutter to open and close: a shutter speed of 1/250 second6up to speed (on/with something) having the information you need to understand what has been happening in a particular situation: We need to bring everyone up to speed on the project.[Origin: Old English sped success, quickness] → see also -speed noun | verb speedspeed2 ●○○ verb (past tense and past participle sped /spɛd/ or speeded) 1[intransitive always + adv./prep.] to go quickly: speed along/down/past/away etc. The car sped along the dusty highway.► see thesaurus at rush12[transitive always + adv./prep.] to take someone or something somewhere very quickly: speed somebody to/away/back etc. Security guards sped her to a waiting helicopter.3[intransitive usually in progressive] to be driving faster than the legal limit: I’m sure I wasn’t speeding, officer. Mort got caught speeding again.4[transitive] to make something happen faster SYN speed up: The good news should speed his recovery. → see also speedingspeed by phrasal verb if time speeds by, it seems to pass very quicklyspeed up phrasal verb speed something ↔ up to move or happen faster, or to make something move or happen faster: Speed up – we’re going to be late. The new system will speed up the registration process. |
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