中文摘要：

讨论了电磁直线加速动态黑洞时空中的同时面问题，指出虽然全局性的统一时刻不可能建立，但时空中可以有二维同时面存在．一个无限趋近于黑洞视界面的旋转对称曲面是一个二维同时面．

英文摘要：

In this paper, the synchronous surfaces existing in a non-uniformly rectilinearly accelerating black hole space-time with electric and magnetic charge were studied. It was demonstrated that there are 2-dimension synchronous surfaces in the space-time,though there is no global 3-dimension synchronous surface. Especially, a rotating symmetrical curved surface which approaches infinitely to the event horizon is a 2-dimension synchro- nous surface.