求翻译：同时阐述了目前超高压输电线路光纤保护应用情况，并对在高海拔地区光纤差动保护在实际应用中几个问题进行分析研究是什么意思？

Also explained the current protection of EHV transmission line fiber optic applications, and optical fiber at high altitudes in the practical application of differential protection analysis of several issues

While the current EHV transmission lines, and fiber-optic protection applications in high-altitude areas of fiber-optic differential protection in several of the issues in practical application analysis studies

Simultaneously elaborated the present ultrahigh voltage transmission line optical fiber protection application situation, and to several questions conducts the analysis research in the high elevation area optical fiber differential motion protection in the practical application

Meanwhile expounded the current fiber protection in EHV transmission line and high altitude fiber differential protection in practice several problems for analysis

Also describes the present fiber optic protection for EHV applications, and optical fiber differential protection in high altitude areas in the analysis of several problems in the practical application of research