The electron-stripping process, known as ionization, heated the helium gas from 18, 000 to nearly 40, 000 degrees Fahrenheit (10, 000 to 22, 000 degrees Celsius).
电子脱离的过程，即离子化，把氦气从华氏18’000度加热到40’000度（摄氏10’000度至22’000度）。
Based on relativity quantum defect theory of ions energy levels, an expression of ionization energies of helium-like ions has been given.
依据离子能级的相对论量子亏损理论，给出了类氦离子电离能的一种表达式。
By determining when this transition took place, scientists can pin down the start date of the helium-ionization era.
通过确定电子跃迁的地点，科学家可以确定氦电离时期的起点。
By determining when this transition took place, scientists can pin down the start date of the helium-ionization era.
通过确定电子跃迁的地点，科学家可以确定氦电离时期的起点。
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