| 词汇 | light-year |
| 释义 | light year noun[ C ] uk /ˈlaɪt ˌjɪər/ us /ˈlaɪt ˌjɪr/ the distance that light travels in one year (about 9.5 million million kilometres)光年（指光1年走过的距离，约为9.5兆公里） Years & yearly academic year ad Anno Domini annual annually bissextile calendar year CE centenary church year Gregorian calendar interannual Julian calendar leap year liturgical year year year end year's end year-around year-round You can also find related words, phrases, and synonyms in the topics: Measurements in general Idiomlight years away light year | American Dictionarylight year noun[ C ] us/ˈlɑɪt ˌyɪər/ earth science the great distance that light travels in one year; about 5,880,000,000,000 miles or 9,460,000,000,000 kilometers earth science People sometimes say light years to talk about an extremely long distance or time: When I was a young man, being 50 seemed light years away. Examples of light yearlight year The year 1921 was an exceptionally lightyear for sickness, and many actuaries regarded it as an abnormally lightyear. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 In a lightyear a ray of light travels 6 trillion miles, but we do not want to go into that. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 When they come within one lightyear of one another, they will emit gravitational waves that will radiate further orbital energy until they merge completely. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In some cases, specialized units are used, such as the astronomer's parsec and lightyear or the particle physicist's barn. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It would need about 17,565 years at this speed to travel a complete lightyear. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. This was coherent with the estimation made by astronomers in 1938, but after some additional measurement, this distance was re-estimated at 14.3 lightyear. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Along its longest visible dimension, it thus measures about 13 3 lightyear across. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. This is equivalent to moving a distance of one lightyear every 14,700 years. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The distance to this star has been measured directly using the parallax method, which places it away with a margin of error of about a lightyear. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The nearest other intelligent life form must be roughly 10 billion light years away. Partly for this reason, it is still the unit preferred in astronomy and astrophysics, though the lightyear remains prominent in popular science texts and more everyday usage. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. If this acceleration were to continue forever at its present rate, our descendants could devour only the region currently within about 10 billion light years. However, if the player happened to find a system 655.36 to 670.36 light years away, it would be counted by the game as within the 15 lightyear range. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Their results indicate that the bar is 27 000 light years long. Our standards of training are already light years ahead of those in almost every private security company. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 See all examples of light year These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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