求翻译：利用原子力显微镜系统，研究了铁电材料在外电场作用下电畴的微观演化规律。利用PMN-PT单晶的试验结果，提出了M-L模型，给出了试验点的极化方向和观察表面垂直时电畴的理论演化规律。本文同时研究了三种不同相结构的PZT陶瓷在外电场作用下的电畴的微观演化规律，指出了微观演化规律依赖于试验点的极化方向和外电场的取向关系，而不依赖于其相结构。是什么意思？

By atomic force microscope system to study the ferroelectric material outside the micro-evolution of the electric field domain. Pmn-pt single-crystal results, the ml model, given the theoretical evolution of the domain perpendicular to the polarization direction of the pilot sites and to observe the

Using atomic force microscope system, research the ferroelectric materials in the foreign news media -- the role of micro-evolution. Use single-crystal PT PMN - the results of the trial, made a M - L model, the polarization direction of the test point and the surface area when the theory evolution.

Using the atomic force microscope system, has studied the ferroelectricity material under the outside electric field function the el

Using an atomic force microscope system, study of ferroelectric material domains under external electric field micro-evolution. PMN-PT test results of single crystals, made a M-L model, test points are given when vertical polarization direction and observation of surface electron domain theory of ev