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 emission [ɪ'mɪʃən]   添加此单词到默认生词本
n. 发射, 射出, 发行

[医] 发射, 遗精

[经] (纸币等的)发行, 发行额


  1. Emission and propagation of energy in the form of rays or waves.
    发射以光线或波的形式发出和传播能量
  2. In cathode ray tube display, the continuation of light emission from phosphor after excitation by the electron beam.
    在阴极射线管显示器中，用电子束激励后荧光物质光发射的持续现象。
  3. Emission of visible light by living organisms such as the firefly and various fish, fungi, and bacteria.
    生物发光生物体的可见光发射，如萤火虫、彩色鱼类、真菌类和细菌


emission
[ noun ]
  1. the act of emitting; causing to flow forth

    2. <noun.act>
  2. a substance that is emitted or released

    3. <noun.substance>
  3. the release of electrons from parent atoms

    4. <noun.process>
  4. any of several bodily processes by which substances go out of the body

    5. <noun.process>
    the discharge of pus
  5. the occurrence of a flow of water (as from a pipe)

    6. <noun.event>


Emission \E*mis"sion\, n. [L. emissio: cf. F. ['e]mission. See
{Emit}.]
1. The act of sending or throwing out; the act of sending
forth or putting into circulation; issue; as, the emission
of light from the sun; the emission of heat from a fire;
the emission of bank notes.

2. That which is sent out, issued, or put in circulation at
one time; issue; as, the emission was mostly blood.

{Emission theory} (Physics), the theory of Newton, regarding
light as consisting of emitted particles or corpuscles.
See {Corpuscular theory}, under {Corpuscular}.

  1. A company wishing to build hazardous-waste facilities in Pennsylvania must meet certain "siting criteria," such as distance from water supply and the presence of wetlands, as well as meet technical criteria such as emission levels.
  2. They require mandatory inspection of exhaust emissions and assembly-line testing and prohibit the sale of replacement parts that do not meet emission standards.
  3. The White House has promised to re-evaluate and, if necessary, modify the climate programme next autumn to keep the emission reductions on track. 'We are simply not going to look at this on a month-to-month basis,' Mr Warren says.
  4. Would the United States be entitled to an "emission credit" _ meaning a reduction by less than 30 percent _ in view of efforts it has already taken unilaterally to control pollution.
  5. LOS ANGELES (AP) - California adopted strict auto emission rules to compel production of a new generaion of ultra-clean cars and fuels, toughening the strictest air quality controls in the nation.
  6. The government has recently closed scores of factories for not complying with tougher emission standards and ordered taxis and minibuses to use cleaner fuels.
  7. To the extent that the $150 million budget will allow it, Mr. McDonough will rely on solid wood, rather than plywood or particle board, to limit the emission of formaldehyde.
  8. The Chicago Board of Trade, the world's biggest futures exchange, said in July that it planned to offer futures contracts on the emission allowances.
  9. The carbon dioxide produced when the algae are burnt is redirected to help new algae grow, preventing the emission of greenhouse gases. The first power station could be in use within 18 months.
  10. There is no point in forcing companies to spend vast sums of money to achieve marginal improvements in emission levels, he says.
  11. Canada adopted U.S. auto emission standards in 1985, and most European countries are only beginning to contemplate such controls.
  12. He used the Canada-France-Hawaii optical telescope and the United Kingdom Infrared Telescope _ both located atop Hawaii's Mauna Kea volcano _ to pick up light and infrared radiation from the precise point where the radio emission had been detected.
  13. Tougher tailpipe emission controls on automobiles would reduce smog-causing pollutants by 22 to 60 percent, depending on the pollutant.
  14. It shows that, even with 80 per cent emission reduction (the level recommended by scientists), the UK could burn 37.5m tonnes of British coal without committing itself to flue gas desulphurisation (FGD) construction.
  15. "The IFF emission from flight 655 was Mode 3, which a commercial aircraft normally uses.
  16. A reduction of smog-causing pollution from automobiles through tighter tailpipe emission controls, cleaner fuels and a phase-in through fleet operators of more alternativ fuel vehicles.
  17. This will prevent it from significantly mitigating the effect of 17.5 per cent domestic fuel VAT on the elderly and poor, and helping itself achieve CO emission reduction targets by the year 2000.
  18. Blackburn said in interviews this week that Sharon Steel is risking possible fines by operating its Monessen, Pa., plant without anti-sulfur emission controls that are required by a federal court consent decree.
  19. Ney said Celeste has promised some form of sulfur dioxide emission reductions to fellow Democrat Cuomo, possibly in exchange for New York's dropping of a federal lawsuit that attempts to force emission reductions in coal-burning states.
  20. Ney said Celeste has promised some form of sulfur dioxide emission reductions to fellow Democrat Cuomo, possibly in exchange for New York's dropping of a federal lawsuit that attempts to force emission reductions in coal-burning states.
  21. Cars made for sale in California have different exhaust emission control systems than for general sale.
  22. The White House earlier in the week abandoned its staunch opposition to a second round of auto tailpipe emission controls, but details of how such controls might go into effect have thwarted agreement among the negotiators, participants said.
  23. Strict air emission monitoring.
  24. But agreement on auto emission controls, which were targeted by the administration as too expensive, proved to be more difficult.
  25. The rules require auto makers to improve emissions control systems on vehicles and, by 2003, to certify that at least 10% of the cars and trucks sold in Massachusetts are "zero emission" vehicles, such as electric cars.
  26. That plan would have provided hefty unemployment benefits to coal miners laid off due to declining demand for coal amid rising factory emission requirements.
  27. Washington and Moscow are resisting the setting of targets now. They argue more study is needed to justify huge expenditures on emission controls.
  28. They could produce vehicles meeting any of five emission standards, rather than a uniform tailpipe standard, just so long as the manufacturer's average fleet met certain requirements.
  29. Under the EPA timetable, the agency plans to study incinerator pollutants over the next two years, and then set standards defining what are acceptable levels of emission from new facilties.
  30. Current cars must meet strict standards for emission of unburned gasoline vapor out the tailpipe and for evaporation.
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emission measure (EM)
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