单词 | to shut down |
释义 | > as lemmasto shut down to shut down 1. intransitive. To be closed with a lid; to come close down like a lid. Of fog, night: To come down and blot out the view. ΘΚΠ the world > space > relative position > closed or shut condition > become closed or shut [verb (intransitive)] > be closed with a lid or like a lid to shut down1807 the world > time > day and night > day or daytime > evening > become evening [verb (intransitive)] > fall (of night) or grow dark fallOE nightc1440 to fall ona1450 nighten1561 gloom1595 gloam1819 dusken1870 dusk1876 to shut down1880 the world > physical sensation > sight and vision > invisibility > be or become invisible [verb (intransitive)] > block out view to shut down1891 the world > the earth > weather and the atmosphere > weather > cloud > mist > [verb (intransitive)] > come down (of mist or fog) to come down1891 to shut down1891 1807 R. Southey Lett. from Eng. I. 161 The whole shuts down a-top, and closes in front, like a cabinet. 1880 ‘M. Twain’ Tramp Abroad xix. 182 We got to..Heidelberg before the night shut down. 1891 E. Roper By Track & Trail i. 12 The fog shut down on us once more. 1897 ‘O. Rhoscomyl’ For White Rose Arno (U.K. ed.) 140 The night shut down. 1900 Blackwood's Edinb. Mag. Mar. 385/2 The forest shuts down upon the edge of the running water. 2. transitive. To close by lowering, etc. ΘΚΠ the world > space > relative position > closed or shut condition > close or shut [verb (transitive)] > by lowering to shut down1794 the world > movement > motion in a certain direction > downward motion > causing to come or go down > cause to come or go down [verb (transitive)] > lower or let down > lower in order to close to shut down1794 1794 J. MacPhail Treat. Culture Cucumber 91 The lights of the cucumber bed were kept close shut down day and night. 1836 O. W. Holmes Music-grinders 72 Then..shut the window down. 1842 J. C. Loudon Suburban Horticulturist 499 The lights may be shut down. 3. To close (a manufactory). absol. To stop working. ΘΚΠ society > occupation and work > work > times or periods of work > work at specific times or periods [verb (intransitive)] > stop work to shut (one's) shop-windowc1478 to shut up one's shop1560 unyoke1594 to put up the shutters1877 to shut down1877 strike1890 stand1892 to knock off1916 society > occupation and work > business affairs > a business or company > run a business [verb (transitive)] > close business to close out1852 to shut down1877 1877 R. W. Raymond Statistics Mines & Mining 226 The hands..forced the superintendent to shut down. 1880 Paper & Printing Trades Jrnl. xxx. 6 Most of the paper~mills that were shut-down..are being started anew. 1912 A. Keith Human Body xv. 241 When men and women lead sedentary and quiet lives their lungs are partly shut down. 4. Mechanics. To stop or switch off (a device or machine, esp. an engine); to cause to stop working or running. Also absol. ΘΚΠ society > occupation and work > equipment > machine > render mechanical [verb (transitive)] > operate machine > switch off or close down to shut down1895 decommission1980 1895 G. W. Lummis-Paterson Management of Dynamos x. 148 When shutting down a machine, the load should first be gradually reduced..by easing down the engine. 1911 Marshall & Sankey Gas Engines vi. 175 [Filling the reservoir] is done when shutting down the engine so soon as the gas is turned off. 1948 H. Constant Gas Turbines xi. 137 The best that can be done is to shut down as many engines as possible and operate the remainder at a power output giving reasonable efficiency. 1969 I. Kemp Brit. G.I. in Vietnam viii. 163 We all ‘shut down’—switched off our engines and made fast the rotor blades to the tails of the helicopters. 1976 Physics Bull. Aug. 339/2 Two samples were taken from the low-sulphur plant: one at ambient temperatures 30 days after the boiler had been shut down. 1980 Daily Tel. 10 Mar. 3/2 A nagging ‘oil migration’ problem..could eventually have forced a pilot to shut down the engine. 5. Physics. To stop (the chain reaction) in a nuclear reactor; to stop (a nuclear reactor) from producing useful power by making the fuel assembly subcritical. ΘΚΠ the world > matter > physics > atomic nucleus > nuclear fission > nuclear reactor > close down [verb (transitive)] > for safety reasons to shut down1945 scram1950 1945 Hawley & Leifson Atomic Energy 157 Knowing just when to shut down the chain-reaction..would be quite a problem. 1951 Nucleonics Jan. 5/2 If the temperature of the uranium exceeds 60°C, the pile is automatically shut down. 1963 B. Fozard Instrumentation Nucl. Reactors xiii. 164 Unless a heavy-water reactor is shut down for such a long period that there is a significant fall in the activity of the high-energy gamma emitters, it has a built-in neutron source. 1976 Sci. Amer. Jan. 27/2 The level of radioactivity in a standard 1,000-megawatt reactor is very high: about 10 billion curies half an hour after the reactor is shut down. 6. intransitive. Of a device, machine, or installation, esp. a nuclear reactor: to cease to operate. ΘΚΠ the world > action or operation > ceasing > cease activity [verb (intransitive)] > specifically of things, actions, or processes > cease to be active (of things) cease1382 to shut down1945 society > occupation and work > equipment > machine > render mechanical [verb (intransitive)] > of machine: operate > cease to operate jam1885 to have had it1942 to shut down1945 the world > matter > physics > atomic nucleus > nuclear fission > nuclear reactor > of reactor: become self-sustaining [verb (intransitive)] > close down to shut down1945 scram1957 1945 H. D. Smyth Gen. Acct. Devel. Atomic Energy Mil. Purposes viii. 81 The half-life of the U-239 is so short that its concentration becomes negligible soon after the pile shuts down. 1960 Engineering Index 1959 246/2 During power failures of up to 1·5 sec duration..synchronous motors usually shut down. 1976 Sci. Amer. July 36/1 After the reactor had shut down, the evidence of its activity was preserved virtually undisturbed through the succeeding ages of geological activity. 1978 Nature 19 Oct. 576/2 As the voltage dropped rapidly various sensors began to shut down, and within a few minutes the satellite ceased to respond to commands sent up from ground control stations. 1979 Daily Tel. 15 Aug. 32/3 The Sea Kings will operate throughout the night but the others do not have night capability and will have to shut down for the night. < as lemmas |
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