我们用它们来介绍某事的原因。

We use them to introduce the reason for something.

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发布博客文章或公开的感谢你得到了一个VC的帮助，帮你介绍某人或某事，之后VC就会收到一封电子邮件提醒他们。

Post a blog article or public thank-you when a VC helps, mentors or introduces you to someone or something, and the VC will get an email alerting them.

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引出做某事的人或东西，或介绍做某事的方法。

"By" introduces what (or how) something is done by or the method by which it is done.

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