她不久便发现自己做了一笔不上算的生意。

She soon found that she had made a bad bargain.

《新英汉大辞典》

《女性谈判指南》的作者帮你算了一笔账：如果你不指导年轻同事，公司雇佣专业顾问要花多少钱？

The authors recommend you do the math: What would the company have had to pay a coach if you hadn't acted as a mentor?

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许多人推荐使用许多不同颜色的笔和画图画，你可以那样也可以不，怎样都好。

Many people recommend using many different colored pens and drawing pictures. This may or may not be for you-yet anyway.

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And as an aside, those in the room who are among those more comfortable, even if we're not quite filling in blanks today, realize we will very quickly entice you with details that you don't already know.

说句题外话，你们中有一些,看起来聚精会神，实际上开小差的同学，也许我还不能对号入座，但这些人必须意识到，我会一笔带过,一些你们可能不懂的问题。

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I mean, you've been banging on that pen for a long time and I don't understand why.

我是说，你一直用那支笔敲来敲去，我不明白为什么。

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I'm not sure if I'm ready to invest that much money right now.

我不清楚我该不该把这么大一笔钱拿去投资。

Let me 实战 - SpeakingMax英语口语达人