推广服务的英文：
extension service
n. 伸展；延长；延期；电话分机
Removed the sablotron extension in favor of the new XSLT extension.
去掉了sablotron模块，使用新的XSLT扩展模块
The greatest difference was noted in extension.
伸展测试的差异是最显著的。
addition or extension that prolongs sth
增加或延长的部分.
Such contamination has been extensively studied.
人们对这种污染进行了大量研究。
They own extensive land by the sea.
他们拥有海边的辽阔土地。
n. 公共服务系统；公共事业机构；政府机构；帮助，效劳
v. 检修，维修；为…提供服务
overhand service
高手发球
take service with
在￥帮佣
express goods service
特快货运业务
We need to have the car serviced.
我们得把车送去检修一下了。
to service treasury Bonds
支付国债利息