1.Like its counterparts, the core WordPress package is free and open source, but they also offer premium servicesto end-users.
和它的附件一样，Wordpress核心包是免费开源的，但是他们同时向最终用户提供收费服务。
2.Being a full member of Water Quality Association, we offer premium pre-sale consultation and aft. . .
作为美洲水质协会之会员，本公司提供各项咨询及售后服务。