准备工作、前期准备工作preparatory workfirst-phase preparationA good job should be done in the preparatory work for new projects. 新上项目要认真做好前期准备工作，抓紧实施前期准备工作已经完成。The first-phase preparations have been finished
“我们有提前做好事先准备”英文有如下表达：We have prepared well in advance.Preparations have been done in advance.We have done some preparations ahead of time.We have got ready for it ahead of time.
