| 单词 | polar night |
| 释义 | polar night noun[CorU] uk/ˌpəʊ.lə ˈnaɪt/us/ˌpoʊ.lɚ ˈnaɪt/anightor thetimeinwinteratplacescloseto theNorthorSouthPole, when thesundoes notappearabove thehorizon 极夜Days & times of day
Examplesofpolar nightpolar night A woman in thepolarnight. From theCambridge English Corpus Activity is at a stand-still during thepolarnight, which lasts for many months. From Wikipedia  This example is from Wikipedia and may be reused under a CC BY-SA license.Inside thepolarnightjet is the polar vortex. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Below this barrier exists thepolarnightjet, which is weak in the early winter, so any descending polar air mixes with the mid-latitudes. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Further, there is no interference from the sun in the millimeter range during the months ofpolarnight. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.However, at the outer boundary of the polar vortex, in winter, the stratosphericpolarnightjet exists. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Each kind ofpolarnightis defined as when it's darker than the corresponding kind of twilight. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.The opposite phenomenon,polarnight, occurs in winter when the sun stays below the horizon throughout the day. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.During the astronomicalpolarnightstars of the sixth magnitude, which are the dimmest stars visible to the naked eye, will be visible throughout the entire day. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.This is called apolarnight. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.That is thepolarnight. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.These areas either receive sunlight (midnight sun) or shade (polarnight) 24 hours a day because of the earth's tilt. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Polarnightand midnight sun last about 3 months per year on the south and 5 months on the north. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.The flora benefits from the long period of midnight sun, which compensates for thepolarnight. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.The sun shines 24 hours in the summer, and barely ever shines at all in the winter (see midnight sun andpolarnight). From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.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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