做好足够的准备，及时掌握库存，稳定货源供应非常重要。
Adequate preparation, timely grasp of inventory, stable supply of goods is very important.
务必参加所有的课程，留出足够的时间来完成作业，为考试做好准备。
Be sure to attend all classes and leave enough time to finish your assignments and prepare well for examinations.
为考试做好准备和避免不必要的考试压力的关键是知道你需要知道什么，为你的复习做计划和准备，并给自己足够的时间来做。
The keys to being prepared for exams and avoiding unnecessary exam stress are knowing what you need to know, planning and preparing for your revision, and giving yourself enough time to do it.
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