英语语法分析

The nonlinear mechanism is the excitonic band broadening.

非线性机制为激子带展宽。

At low magnetic field, the effects of magnetic-field-induced confining potential on the main features of the excitonic spectra are negligible.

在较低磁场下，其引入的限制势对激子吸收谱的主要特性的影响可以忽略。

Since core-level excitation is not involved in the process related to IPES, signal distortion caused by excitonic effects is not present in IPES.

由于过程中不包括芯能级激发，因此可避免芯能级激发时伴随的“驰豫过程”引起的信号失真。