求翻译：回首半世纪来的海岛铁警历史，最让我们刻骨铭心的无疑是：面对接踵而至、惊涛拍岸般的局势变换和接踵而至的重大安保任务，历代海岛铁警上下同心，众志成城，危中寻机，应对挑战，成功完成一个又一个华丽转身。是什么意思？

No doubt look back on the last half century the island Tiejing history, the most memorable are: the face after another, like the situation of the great tide of transformation and followed the major security tasks, The Chronicles island Tiejing unity, united, crisis in the timing, meet challenges and

正在翻译，请等待...