学习如何在英语句子中使用 back-of-the-envelope。超过 2 条精选例句，附带译文。适配手机，完全免费。由 Mate 提供支持。
Doing some quick back-of-the-envelope calculations, he reckoned that the raw materials actually cost less than one-thirtieth of the selling price.
从英语翻译成西班牙语
We can do some back-of-the-envelope calculations before all the facts come in.
从英语翻译成西班牙语
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