求翻译：2）婚礼活动执行人员——活动执行人员需要了解很多知识，各种制作的材质特殊性，安装问题，制作工艺等等；设备（灯光音响等）的基础知识掌握，以及很多物理知识。执行者也要有一个掌控大局的能力，协调沟通能力。市场材质的价格，及供应商的资源。是什么意思？

2) wedding event executives - executives need to know a lot of activities, knowledge of the production of special materials, installation problems, production process, etc.; equipment (lighting and sound, etc.) to master the basics, and a lot of physical knowledge. Executives should have a capacity

2) wedding activities implementation of personnel-Active practitioners need to know a lot of knowledge, particularity made of various materials, installation problems, production processes, and so on; equipment (lighting, audio, and so on) basis of knowledge, and a number of physical knowledge. Perf