查询词典 helium

Isotope geochemistry of noble gases Expounded the relations of 3 He4He ratio and the classif ication of tecto nic regions in China, the composite storage of mantle helium, the controversy of mantle methane and the gas-source rock correlation.

稀有气体同位素地球化学阐述了3He4He值与中国构造分区，幔源氦的复合成藏和幔源甲烷问题以及气源对比等3。

Welding to materials like aluminum, copper, white metal, and brass that have low melting temperatures and are easily oxidized, can be facilitated by flushing the welding spot with nitrogen, argon, helium, carbon dioxide or some similar protective gas.

焊接那些像铝、铜、白合金、黄铜这些熔点很低、易于氧化的材料，使用氮气、氩气、氦气、二氧化碳或一些类似的保护气体，吹洗焊接焊点。

The dry atmosphere consists almost entirely of nitrogen (78.1% volume mixing ratio) and oxygen (20.9% volume mixing ratio), together with a number of trace gases, such as argon (0.93% volume mixing ratio), helium, and radiatively active greenhouse gases such as carbon dioxide (0.035% volume mixing ratio), and ozone.

干大气几乎完全由氮（78.1%的体积混合比）和氧（20.9%的体积混合比）构成，还包括一些微量气体，如氩（0.93%的体积混合比）、氦，以及对辐射起作用的温室气体如二氧化碳（0.035%的体积混合比）和臭氧。

The neutrons are generated by bombard ing a heavy form of hydrogen, called tritium, with a lighter isotope of the gas, called deuterium. The resulting collisions create helium atoms and a stream of neutrons.

中子是通过氢的一种名叫氘的较氚轻的同位素来撞击它的一种名叫氚的重同位素而产生的，它们之间发生的碰撞创造了氦原子和中子流。

Helium Music Manager contains all the functions you need to enjoy and organize MP3s, CDs and vinyls – integrated into one application.

可以进行音乐标签修改、曲目重命名、音乐播放、管理播放列表等操作，支持支持 MP3、WMA 等大多数主流音乐文件格式。

Taking ground-state helium for example,toget the ground-state energy as well as -2.90328 a.u.,withthe full-set scheme,we have to use 361 HH and 4 GLF;whilewith PHGL,only 51 PH and 4 GLF is needed,the eigenenergyis -

所需超球径耦合微分方程的个数或广义本征矩阵的维数较完备展开法显著降低。如对He原子的基态，完备展开为了得到-

Objective To investigate the therapeutic effect of Argon-Helium cryotherapy combined with non-methylated CpG-ODN in treatment of rabbit liver cancer.

目的 探讨氩氦冷冻治疗对肝癌转移的影响及继发免疫效应的抗肿瘤效果。

The application of argon-helium system promoted the cryosurgery to the higher level

氩氦冷冻系统的应用将肿瘤微创治疗提高到新的水平

It took Cockcroft and Walton five years to build a machine that worked. Finally, in April 1932, they had a machine that produced a steady stream of hydrogen nuclei with an energy of about half a million volts. They were carefully measuring the quality of the stream, in no hurry to begin doing nuclear experiments. On the morning of April 13, Rutherford came into their room, saw what they were doing, and lost his temper. He told them to stop wasting their time and do some science. The next day, Cockcroft was occupied with other business. Walton was alone in the laboratory, ready to do the first experiment, using his hydrogen nuclei to bombard a target made of the light metal lithium. The result was spectacular. The lithium nuclei were split in two and fell apart into pairs of helium nuclei.

用了五年时间，考克饶夫和华尔顿建造出了第一台能运行的加速器，最终，在1932年，他们制造出了能够提供稳定氢粒子流的加速器，粒子能量大约为50万伏特，他们并没有急着做核试验，而是精心测量了粒子流的性质，4月13日清晨，卢瑟福来到他们的房间，看到他们还在测量，大发雷霆，告诉他们停止浪费时间，开始科学研究，第二天，考克饶夫就被安排了其他事情，只剩华尔顿一个人在实验室里，准备做第一次实验，用他的氢粒子流轰击用轻质金属锂作的标靶，结果极为壮观，锂原子被分裂成两半形成一对氦原子，氦原子释放出的能量比氢原子注入的多达三十倍！

Certification issued after extensive pressure and cycling tests with H.P. helium, witnessed by TA-LUFT inspectors, assures the design and performance of a given stem seal to be equivalent to a bellows seal design.

在TA-LUFT监察员的见证下，经过高压氦的大范围压力和循环测试后，签发了证书，保证所给的阀杆密封的设计和性能可以与波纹管密封相比。

He and Nina moved to California and lived at 2005 Ivar Street, Apt.

他和Nina搬到加州，并在2005年伊瓦尔街，公寓生活。

Droperidol （ potently inhibits transfected HERGchannels and this is the probable mechanism for QT prolongation.

氟哌利多有效地抑制了转染的 HERG 钾通道，可能是 QT 间期延长的机制。