Those taking the course for credit can satisfy the requirement for written work in one of two ways: a typical class paper, or, a pair of review essays.
上这门课要拿学分的同学可选择两种方法之一满足书面作业的要求：典型的课程论文，或者两篇评论文章。
This paper is a brief review of the research and development work over past years.
谨以此文对过去几年来的研发工作进行小结和回顾。
In order to reduce the amount of review work, the paper presents desirable corrective equations.
文章针对这些错误推导出了相应的改正公式，减轻了外业重测的工作量。
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