prophase preparation的用法和樣例：
例句
- Currently the project is redoubling its efforts to advance the work of preparation.
目前該項目的前期工作正在緊鑼密鼓地籌備之中。 - 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.
摘要上海市明珠線(xiàn)二期工程在規劃設計的前期工作階段作了很大的努力，使工程造價(jià)得到了有效的控制。
