| 单词 | umbra |
| 释义 | umbra noun[CorU] physicsspecializeduk/ˈʌm.brə/us/ˈʌm.brə/pluralumbrasororumbraethedarkinnerpartof ashadowin which alllightisblocked, usedespeciallyabout ashadowmade during aneclipse 荫；阴影；（尤指日食发生时的）本影，暗影Compare penumbra Darkness & becoming dark
You can also find related words, phrases, and synonyms in the topics: Astronomy Examplesofumbraumbra At one extreme, in the umbrae of sunspots and pores, where the imposed field is strong and almost vertical, normal convection is substantially inhibited. From theCambridge English Corpus The diameter of theumbradoes not decrease appreciably within the changes in the orbital distance of the moon. From Wikipedia  This example is from Wikipedia and may be reused under a CC BY-SA license.Umbrais a being entirely composed of light, in nature and essence. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.For a point source only theumbrais cast. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Umbrawas never actually shown in any of the issues. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.An observer in the antumbra, the area of shadow beyond theumbra, will see an annular eclipse. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.It is a narrow path for the moon to pass within the penumbra and outside theumbra. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.The spacecraft systems, and the scientific instruments, are located in theumbraof the shield. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Within theumbra, there is no direct solar radiation. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Umbra, a world record-holding dog, can swim 4 miles (6.4 km) in 73 minutes, placing her in the top 25% in human long-distance swimming competitions. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.The word is formed of the privative particle ", and", ("umbra", shadow). From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.The secondumbrafought, and uses ice. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Umbrawas not among these escapees. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.There are three distinct parts of a shadow created by any non-point light source after impinging on an opaque object called theumbra, penumbra and antumbra. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.An alternative definition is that the penumbra is the region where "some or all" of the light source is obscured (i.e., theumbrais a subset of the penumbra). 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. |
| 随便看 |
|
英汉词典包含213609条英汉翻译词条，涵盖了常用英语单词及词组短语的翻译及用法，是英语学习的必备工具。