helium a 中文意思是什麼

helium a 解釋
氦風洞
  • helium : n. 【化學】氦。 helium-4 氦4〈氦的最常見同位素〉。
  • a : an 用在以母音音素開始的詞前〉 indefinite art 1 〈普通可數名詞第一次提到時，冠以不定冠詞主要表示類...
  1. It has to sit in a bath of liquid helium cooled to just a fraction of a degree above absolute zero ( - 273 c ) in order to work

    為了能夠運行， 「獵人」不得不被放置在有液態氦溶液中，裏面的溫度只比絕對零度（ 273 c ）高一點點。
  2. Although helium is nontoxic and inert, it can act as a simple asphyxiant by displacing the oxygen in air to levels below that required to support life

    盡管氦無毒且不活潑，通過取代空氣中的氧，使之下降到維持生命所必須的水平以下，它可以成為簡單的窒息物。
  3. Helium is a gas used in balloons.

    氦是一種用於氣球的氣體。
  4. He plans to circumnavigate the world in a helium balloon

    他計畫搭乘氦氣球環繞世界一周。
  5. The deuteron can fuse with another proton to make a helium 3 nucleus.

    氘核可以和另一個質子聚合以生成一個氦3核。
  6. Recent experiments have succeeded in obtaining oscillations from the new system, with frequencies of 66hz and 23hz for the cases with helium and nitrogen as the working fluids, respectively. the traveling wave system is expected to be one of the good candidates as a driver for pulse tube refrigerator, leading to a thermoacoustically driven pulse tube refrigerator without any moving component

    還利用deltae對環路部分進行了數值模擬分析，著重討論了系統的起振臨界溫度與臨界加熱功率、效率與加熱溫度的關系、噴射泵的作用以及不同工質（氮氣和氦氣）的比較等，得出一些有益的結論。
  7. A fountain of helium spurt out of the tube.

    有一股氦的噴泉從小管中噴出。
  8. A dense core of incandescent helium is surrounded by a thin shell of hot, fusing hydrogen.

    一個由白熾的氦形成的稠密的核外麵包圍著一層熾熱熔化的氫薄殼。
  9. Standard theory predicts that two neutrinos are produced for every fusion of four protons into a helium nucleus.

    標準理論預言，在由四個質子變成一個氦核的每一次聚變過程中要產生兩個中微子。
  10. Chan and kim observed such a decrease of rotational inertia in a ring of solid helium

    陳鴻渭與金恩成在一圈固態氦中，觀察到這種轉動慣量減少的情形。
  11. The force between a pair of helium atoms is so weak that helium does not solidify at all.

    一對氦原子之間的作用力微弱得使氦根本不能固化。
  12. Since the hydrogen - burning shell and helium - burning core do not produce energy in a stable and steady manner, the star will pulsate and generate strong stellar wind

    由於這時燃燒氫和氦以產生能源的過程並不穩定，星體除了會不斷脈動外，更會產生強勁的恆星風把外殼吹掉。
  13. Their shells, which apart from hydrogen, helium, and carbon also contain portions of the heavy elements formed in the stellar core, are inherently unstable, and their pulsing creates a withering stellar wind a billion times stronger than the solar wind we know today

    它的殼層除了氫層、氦曾和碳層外還有包含一部分產生自恆星核心的重元素，天生的不穩定，它們的脈動產生了一種毀滅性的星風，比我們現在知道的太陽風要強數百萬倍。
  14. In 2004, professor chan received international attention for his discovery, made in collaboration with his former doctoral student, dr. eunseong kim, of a new phase of matter - a supersolid form of helium - 4 with the remarkable properties of a superfluid

    二零零四年，他與其前博士生發現物質新位相氦氣4超固體形式中有超流體的特質，引起國際注目。
  15. Nuclear energy. nuclear fuel cycle technology - waste - non - intrusive, non - destructive determination of the tritium activity of a package containing tritiated waste by measurement of helium - 3 leakage from the package

    核能.核燃料循環技術.廢棄物.通過從封殼里泄露出來的氦- 3的測量對含氚廢棄物封殼的氚放射性進行非侵入和非破壞性測量
  16. It will quietly and steadily burn the hydrogen to helium and become a white dwarf

    它會穩定地把氫轉化為氦，然後安靜的死去，成為白矮星。
  17. The fair s inaugural ceremony began with mayor frank hsieh reading the following prayer written by a fellow initiate : " let knowledge enrich our lives, let wisdom purify our hearts, let us walk on the path of love and let us pray for world peace together. " then the event officially commenced with the release of peace doves and helium - filled balloons bearing the title of master s new book god s direct contact - the way to reach peace

    開幕典禮首先由謝長廷市長代表港都市民朗誦由同修撰寫的祈願文：讓知識能夠豐富我們的生命，用智慧凈化我們的心靈，希望我們一起走在愛的路上，共同祝福世界和平，隨即在和平鴿與寫著清海無上師新書書名和平之道直接和上帝連線的汽球升空中，揭開書展序幕。
  18. At the end of the process a carbon core of the star will be surrounded by a shell where helium is still being fused into carbon, which in turn is surrounded by and envelope where hydrogen is converted into helium

    該過程結束時碳的星核會被一層仍然在進行氦聚變為碳的殼層包圍，而在這個氦-碳聚變層的外面還包圍著一層由氫-氦聚變層。
  19. An airship is a lighter than air aircraft. it has twin engines and uses " helium ", a non - flammable gas, as a lifting gas which is contained in a large envelope

    飛船是較空氣為輕的飛行器，置有兩個發動機，並依靠注入于大型氣囊的不燃氣體氦推動其上升。
  20. It has an inflate method filling it with helium, a deflate method expelling its contents, and a rise method letting go of it

    它具有充氣方法（在其中充滿氦氣） 、放氣方法（放出其中的氣體）和上升方法（釋放氣球） 。
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