我们的废物回收项目已经在上学期末完成了，其中包含许多调查研究和书面工作。
Our waste recycling project involving a lot of investigation and paperwork had been done by the end of last term.
我们的系主任告诉我，如果除了每门课的指定作业之外，我能够做独立的实地调查，那么完成这些调查就可以算作上了中级水平的课程。
My chairperson told me that if I did independent field research in addition to the assigned work in each course; they would count as intermediate-level courses.
我们不试验或调查在过去我们如何完成任务的备选方案。
We don't experiment or investigate alternatives to how we've done it in the past.
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