| 单词 | helium |
| 释义 | Related topics: Chemistryhe·li·um /ˈhiːliəm/ noun [uncountable] HCa gas that is lighter than air and is used to make balloons float. It is a chemical element: symbol He 氦〔一种化学元素，符号为He〕Examples from the Corpushelium• Uranium has two radioactive isotopes, each of which decays to an isotope of lead and helium.• Typically, the fuels are isotopes of the three lightest elements, hydrogen, helium, and lithium.• The Kamikaze: One part liquid helium, two parts prussic acid.• These solar gases contain a large amount of helium, the second most abundant element in the Sun.• The job is made more difficult now because of self-sealing materials and the use of helium.• But in addition there remained the puzzle of how the helium came to be in the springs.• However, the story can be simplified without losing its essence by neglecting the helium for the time being.• The two orbiting electrons of the helium atom form a shell.Origin helium (1800-1900) Greek helios “sun”; because it was discovered in the sun's spectrumhe·li·um nounChineseSyllable is lighter used gas is a to air Corpus and than that |
| 随便看 |
|
英汉双解词典包含236457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。