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cold dark matter是什么意思

发布时间:2020-12-07 作者: 英语查

cold dark matter 是什么意思

中文翻译与英英解释

【天文学】冷黑体。
cold:    adj. 1.冷,寒,冻;冰凉的。 2.冷静的,冷淡的, ...
dark matter:    【天文学】暗物质,黑体〔据称宇宙的90%都是由此种不发光 ...
Cold dark matter (or CDM) is a hypothetical form of matter that interacts very weakly with electromagnetic radiation (dark) and most of whose particles move slowly compared to the speed of light (cold). It is believed that approximately 80% of matter in the Universe is dark matter, with only a small fraction being the ordinary "baryonic" matter that composes stars and planets.

例句与用法

1.In addition , experiments are under way to detect mysterious particles that form the cold dark matter of the universe and to examine protons at higher levels of sensitivity to learn whether they decay
此外,已经有实验开始侦测构成宇宙冷暗物质的神秘粒子,精密度较高的实验也在检查质子是否会发生衰变。

2.The current standard model of elementary particles contains no examples of particles that could serve as cold dark matter , but extensions of the standard model ? developed for reasons quite separate from the needs of astronomy ? offer many plausible candidates
现今的基本粒子标准模型内,并没有任何粒子可以构成冷暗物质,但从标准模型加以推广,则提供了许多可能的候选者,而推广的理由则和天文学上的需求并没有多少关联。

3.Although cold dark matter has its own problems in explaining cosmic structures [ see “ the life cycle of galaxies ” by guinevere kauffmann and frank van den bosch ; scientific american , june 2002 ] , most cosmologists consider these problems minor compared with the difficulties faced by alternative hypotheses
虽然冷暗物质在解释宇宙结构上也有它自身的问题(见《科学人》 2002年8月号星系传奇) ,但大多数宇宙学家认为,较诸其他假说所面对的困难,这些问题可说是次要的。

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