求翻译：预制楼板适用于对建筑抗震设防要求不高的地区（比如汶川及成都地区属于七度设防，可以采用预制板），现浇楼板适用于对建筑设防要求高的地区（比如西安地区属于八度设防，不能采用预制板）。是什么意思？

The precast slab for building earthquake-proof low areas (such as Wenchuan and Chengdu are seven security, prefabricated panels can be used), the floor slab in the areas of high building fortification (such as the Xi'an region are eight security the use of prefabricated panels).