In this case, many interesting phenomena of excitation and photoionization can be observed, for instance, muti-photon ionization, above threshold ionization, tunnel ionization and so on.

这样，我们就可以观察到一些新的现象，如多光子过程，阈上电离，隧道电离等。

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It is shown that autoionization will make processes of above-threshold ionization more complicated and a lot of new effects will appear.

结果表明，自电离的存在使阈上离化过程更为复杂，导致许多新现象的产生。

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