问题描述：
英语翻译
This construction is convenient for use with “back-of-the-envelope” sketches when no computer is
available.
这句话怎么翻译呢?特别是use with “back-of-the-envelope” sketches怎么翻译?
This construction is convenient for use with “back-of-the-envelope” sketches when no computer is
available.
这句话怎么翻译呢?特别是use with “back-of-the-envelope” sketches怎么翻译?
问题解答：
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