他正努力学习，准备参加考试。不能用。
如果我有必要参加考试，这个阶段是我会认真准备考试的时候。
If I have to take exams, this is the stage when I would prepare in earnest for them.
这个分8部分的IDS认证准备系列教程覆盖了在参加考试之前需要了解的所有主题。
This series of eight IDS certification preparation tutorials covers all the basics — the topics you'll need to understand before you read the first exam question.
应用推荐