The results show that backward electron emission yield deviates from inverse cosine law, due to the role of the valence electrons of H2 +.
研究发现背向的电子发射产额不满足余弦关系，这是由于H2 +上的价电子所引起的。
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But our domestic use, low energy consumption and high emission vehicles, backward production tools, production technology, production process, because we have a large number of cheap labor.
Under continuous wave pumping, backward amplified spontaneous emission output power (ASE-) rapidly increases to peak value, and then decreases monotonically to steady-state value.