prophase preparation的用法和样例：
例句
- Currently the project is redoubling its efforts to advance the work of preparation.
目前该项目的前期工作正在紧锣密鼓地筹备之中。 - Much work has been done about the 2nd phase of Pearl Line in the prophase of planning and designing, which controls the project cost efficiently.
摘要上海市明珠线二期工程在规划设计的前期工作阶段作了很大的努力，使工程造价得到了有效的控制。
