intensity, radioactivity, carbon intensity, emission intensity

In 2013, exercise science taught us to pick up the pace.

For Fitness, Intensity Matters

well.blogs.nytimes.com

The lesson that seemed to emerge most persistently from the fitness-related studies published this year was that intensity matters, especially if you wish to complete your workout quickly.

“All these pieces add up to a nice picture but whether it is enough to overcome their radioactivity, that will be hard to tell,” Mr Lewis says.“这一切加起来看上去不错，但是否

intensity

Syllabification: (in·ten·si·ty)

Pronunciation: /inˈtensitē/

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noun (plural intensities)

• 1 the quality of being intense:gazing into her face with disconcerting intensity the pain grew in intensity
• an instance or degree of this:an intensity that frightened her

2 chiefly Physics the measurable amount of a property, such as force, brightness, or a magnetic field:hydrothermal processes of low intensity different light intensities

radioactivity比喻用法



An emission intensity is the average emission rate of a given pollutant from a given source relative to the intensity of a specific activity; for example grams of carbon dioxide released per megajoule of energy produced, or the ratio of greenhouse gas emissions produced to GDP. Emission intensities are used to derive estimates of air pollutant or greenhouse gas emissions based on the amount of fuel combusted, the number of animals in animal husbandry, on industrial production levels, distances traveled or similar activity data. Emission intensities may also be used to compare the environmental impact of different fuels or activities. The related terms emission factor and carbon intensity are often used interchangeably, but "factors" exclude aggregate activities such as GDP, and "carbon" excludes other pollutants.

emission
n.

1. The act or an instance of emitting.
2. Something emitted.
3. A substance discharged into the air, especially by an internal combustion engine.

[Latin ēmissiō, ēmissiōn-, a sending out, from ēmissus, past participle of ēmittere, to send out. See emit.]

ra·di·o·ac·tiv·i·ty (rā'dē-ō-ăk-tĭv'ĭ-tē)
n.

1. Spontaneous emission of radiation, either directly from unstable atomic nuclei or as a consequence of a nuclear reaction.
2. The radiation, including alpha particles, nucleons, electrons, and gamma rays, emitted by a radioactive substance.