Helium(He)

网络氦

英英释义

Helium(He)

• n.a very light colorless element that is one of the six inert gasses; the most difficult gas to liquefy; occurs in economically extractable amounts in certain natural gases (as those found in Texas and Kansas)

  同义词：Heatomic number 2

双语例句

1."Intwoyearswewilldoanotherexperimentwiththesameequipment,butthis timewithmuonichelium,"headded.“未来的两年我们会用相同的设备去做另一个（测量质子大小的）实验，但这次是用μ氢，”他补充道。2.Forexample,Helium(He)(Greek:"helios"="thesun") was found when light from the sun was studied duringaneclipsein1868.比如说，氦（He）（希腊语：‘helios’=“太阳”）从一次1868年日食时候的太阳光中发现。

权威例句

LD50 = Lethal Dose Causing Death in 50 % of the Subjects N2 = Nitrogen N2O = Nitrous Oxide
Electron impact ionization and multiphoton ionization of doped superfluid helium droplets: A comparison
Conceptual Designs for a Spallation Neutron Target Constructed of a Helium-Cooled, Packed Bed of Tungsten Particles
Oscillating ionization probability of hydrogen and helium atoms in a single XUV attosecond and delayed few-cycle infrared laser pulses
Many-body calculation of helium ¹D–³D term intervals for 1snd (n = 12 ∼ 20) high Rydberg states
In-situ administration of dendritic cells following argon-helium cryosurgery enhances specific antiglioma immunity in mice
Effect of Helium-Neon Laser on Fast Excitatory Postsynaptic Potential (f-EPSP)of Neurous in the Isolated Rat Superior Cervical Ganglia
Many-body calculation of helium D-1-D-3 term intervals for 1snd (n=12 similar to 20) high Rydberg states
Temporally and spatially controllable gene expression and knockout in mouse urothelium. Am J Physiol Renal Physiol 299(2):F387-F395
Linear Variation Method for Calculating Energy Levels of the Helium Atom