groundwork造句
        Yesterday's meeting was to lay the 
groundwork for the task ahead.
昨天的会议是为以后的工作做准备。
These courses provide the 
groundwork of statistical theory.
这些课程介绍的是统计学理论的基础。
Officials are laying the 
groundwork for a summit conference of world leaders.
官员们正在为世界首脑峰会做准备工作。