preparatory work的用法和样例：
例句
- There is much preparatory work for us to do.
我们有许多准备工作要做。 - Prepare perennial essential preparative work.
常年必要的计量准备工作。
preparatory work的相关资料：
临近单词
preparatory
preparatory school student
preparatory Chinese course
Preparatory Constitutional
preparatory course Chinese
preparatory Chinese students
preparatory training program
preparatory education abroad
preparatory college education
preparatory physics experiment
Preparatory Committee of Election
