packing service的用法和样例：
例句
- The data link layer provides a service to the network layer by encapsulating the network layer information in a frame.
资料链结层透过将网路层资讯封装入讯框的方式，提供服务给网路层。 - Dai Nippon business card printing and membership card which will provide on making this is offeris nmsio and back the whole service.
大日本制卡和会员卡制作此次将提供的是背面封装材料和背板合为一体的服务。
