helium
美 [ˈhiliəm]英 [ˈhiːliəm]
- n.氦；氦气
- 网络食品添加剂氦；高纯氦；氦元素
heliumhelium
氦
相对原子质量_百度百科 ... hydrogen 氢 helium 氦 lithium 锂 ...
氦气
吸氦气(Helium)会唔会对身体有害?我见有d外国既卡通配音员会吸Helium令自己把声变得卡通化，会唔会上瘾架？
食品添加剂氦
美国FDA 21 CFR 第184部分GRAS物质 -... ... §184.1351 食品添加剂黄芪胶（ Gum tragacanth） §184.1355 食品添加剂氦（ H…
高纯氦
atomic - CAS号查询 ... 钠; sodium; 高纯氦; Helium; 钒; Vanadium; ...
氦元素
氦元素（Helium）下面数字和元素符号各表示什么意义?2S、3H、4Cu、Ag
液态氦
液态氦(helium)：沸点4.2°K，为主要的冷却剂。 ※优点：磁场强度高＞4T、磁场均匀度好、电费少、速度快、讯杂比(SNR)高。
氦原子
已知最小的原子是氦原子(helium), 半径在30pm左右[5].一个pm(皮米)是什么概念? 一个皮米, 就是1×10^-12m[6], 是一个"埃"-Å(Å…
1
He sat down in his lawn chair. Attached to his lawn chair were 105 large helium balloons.
他坐在草坪椅上，椅子系著一百零五颗灌满氦气的大气球。
2
The sun is relatively young, part of a generation of stars known as Population I, which are relatively rich in elements heavier than helium.
太阳相对来说还年轻，属于我们所谓的I类恒星，这类恒星中的比氦重的元素相对丰富一些。
3
Nearly all their mass is made up of hydrogen and helium, giving them compositions like that of the sun.
它们的几乎全部质量都由氢和氦贡献，这使得它们的组成成分与太阳类似。
4
Just a little British ingenuity that saw a standard digital camera taped to a helium balloon and floated into the sky.
只需要点英国人的小智慧，将一个绑在氦气球上的标准数码相机飘入天空，万事俱矣。
5
The star used to be like the sun, a "main sequence" star that burns hydrogen by nuclear fusion, producing helium.
这颗恒星曾和太阳一样，是颗“主序星”（“mainsequence”）。它通过核聚变燃烧氢，从而产生氦。
6
I have here a ball-- you may call it a balloon, but I call it a ball because there's no helium in it.
这里有个小球-，你也会叫它气球，但是我叫它球，因为里面没有氦。
7
So helium was first discovered on the sun before it was later discovered on Earth by looking at the absorption lines of the solar spectrum.
氦元素首先在太阳上，发现，后来，在地球上发现，通过观察太阳光谱，中的吸收线。
8
When the universe was born, there was nothing but hydrogen, helium and a little lithium.
当宇宙诞生的时候，除了氢、氦和少量的锂元素之外，什么也没有。
9
The image was captured using four narrow-band filters that have been tuned to see hydrogen as well as ionized helium, sulfur and oxygen.
获取该图像时使用了四个窄带滤光片，它们都被调谐到可见氢、电离氦、硫和氧。
10
When the helium content is less than 45%, the character of tri-mixed gas has no evident difference compared with that of argon.
混合气体中氦气的体积百分比小于45%时，其电弧特性与氩弧差别不大。
11
The force between a pair of helium atoms is so weak that helium does not solidify at all.
一对氦原子之间的作用力微弱得使氦根本不能固化。
12
He also invented the Skyhook, an air rescue system that involved an airplane and a large helium balloon.
他还发明了高空吊运车，这是一种为飞机和大型的氦气球的空中救援系统。
13
The way these pebble bed reactors work is the helium comes in up the side and down through the pebble bed. It's not a fluidised bed.
这些卵石层反应堆运作的方式是，氦从这面的上面进来，然后，通过这个卵石层再出去，这不是液化层。
14
They observed the oscillations of the helium as it twisted back and forth on the end of a metal rod.
他们让氦在金属杆两端前后扭动，观察它振荡的情形。
15
Look at it again! We gave him an argon- helium cryoablation for his lung cancer.
再来看一看，我们又给他做了肺癌的一个氩氦冷冻消融治疗。
16
Astronomers ascribed them to thermonuclear fusion of hydrogen or helium or to the sudden accretion of matter onto the star.
天文学家因此可将其归因于氢或氦的热核融合反应，或是有物质突然被星体吸附而产生的。
17
Why is america wasting its helium? and what is the metal that you were talking about I've never heard of it.
为什么美国在浪费铪？你说的铪是什么东西，我从来没听说过。
18
Other probes might be sent skimming by Jupiter's atmosphere to collect helium, a valuable gas that Earth may run out of some day.
另外，我们还希望派遣探测船掠过木星的大气层，收集里面珍贵的氦气，以备未来地球上的氦气用完时使用。
19
As the sun burns, the hydrogen in its core converts to helium by fusion, a process through which the nuclei of atoms meld together.
当太阳燃烧时，内核的氢通过核聚变转化成氦，这是一个原子核合并的过程。
20
Betty's helium-filled aerostat, three metres across, is capable of carrying loads of a little over half a kilo.
Betty充满氦气的气囊直径3米，能够负载0.5千克或稍多的重量。
21
The material of this nebula was more than 99% hydrogen and helium, the two simplest elements.
星云中含有超过99%氢和氦，这些元素在宇宙形成之初就已经存在。
22
Helium 3 is not hazardous or even chemically reactive, and it is not the only material that can be used for neutron detection.
氦3的化学性质不活泼，是安全的化学物质，它并不是制造中子探测器的唯一原料。
23
An increased ADC value indicates that the helium atoms were able to travel farther during the measurement time.
ADC值的增加提示氦原子在测定过程中扩散到了更远的距离。
24
Another team, ASACUSA, is studying exotic helium atoms in which one electron is replaced by an antiproton.
还有另外一个ASACUSA团队，则是研究一种奇特的氦原子（反质子取代了其中一个电子）。
25
The output of light and heat of the Sun requires that some 600 million tons of hydrogen be converted into helium in the Sun every second.
太阳所产生的光和热需要每秒将六亿吨氢转化为氦。
26
Thousands of cubic metres of helium were pumped into the towering silver canopy of His balloon.
数千立方米的氦气被灌入高达几米的银色气球中。
27
That left the star with only its helium core, which was a third of the sun's diameter and bore a quarter of its mass.
这样，该恒星只剩下氦核了，这个氦核有太阳直径的三分之一，太阳质量的四分之一。
28
Helium, the second most abundant element in the universe after hydrogen, is one of the main ingredients of star formation.
氦是宇宙都仅次于氢的第二多元素，是形成恒星的主要原料。
29
Robert Richardson, a Nobel Prize winner, warns helium supplies, commonly used in balloons, will run out in 25 years.
诺贝尔奖得主罗伯特·理查森警告称，通常被用作灌注气球的氦气将在25年内耗尽。
30
The next heaviest element in the periodic table, the inert gas helium, is used for detecting cracks in pressure vessels and the like.
在元素周期表中，接下来的更重些的元素是惰性气体氦气，它常被用作检测压力容器和其他类似东西的裂缝。