As a study aid, it is convenient, inexpensive and allknowing.

作为一个学习工具，字典非常方便、便宜而且知识全面。

youdao

I will put a copy of the worksheet in the downloads section in case any of the students have misplaced it, and also because it will be a good study aid for the upcoming test.

我把作业纸放到了下载区，如果有找不到作业纸或者弄丢的同学可以到那再下载。因为本单元即将要考试的内容会与作业纸上的内容相似，请大家一定好好复习。

youdao

I will put a copy of the worksheet in the downloads section in case any of the students have misplaced it, and also because it will be a good study aid for the upcoming test.

我把作业纸放到了下载区，如果有找不到作业纸或者弄丢的同学可以到那再下载。因为本单元即将要考试的内容会与作业纸上的内容相似，请大家一定好好复习。

youdao