document conferencd的用法和样例：
例句
- Companies have already found a number of ways to enhance business through document conferencing.
各公司已经找到通过文档会议增强业务的多种方法。 - To conduct a multipoint document conference using a teleconferencing service provider, conference leaders need to call and reserve dates and time for the conferences.
利用远程会议服务供应商来开多点文档会议，会议主持者需要打电话预定会议的日期和时间。
