英语翻译关于一个为大楼业务提供风险防备的公司的介绍This extensive coverage in this are

英语翻译
关于一个为大楼业务提供风险防备的公司的介绍
This extensive coverage in this area presents an ideal opportunity for MINC Risk Services to offer package deals to many of the larger clients that have a number of developments under management.
这里面many of the larger clients that have a number of developments under management是啥意思?
还有这段话This is the most popular service we offer as it is also the most common element.As mentioned above,MINC Services have some 6000 buildings in their portfolio and their management is legally obligated to manage this aspect of their business.Many of these properties are managed by companies that already employ full time staff to attend to this area of O.H.& S.,however as happens regularly,they rely on frequently outsourcing this service to comfort themselves that their systems are in compliance with the ever changing legislation.
晕啊.这里面most common element 和their management is legally obligated to manage this aspect of their business.还有O.H.& S.,还有 their systems are in compliance with the ever changing legislation.是啥意思?