英语语法分析

Exosome can deliver tumor-derived antigens to induce anti-tumor immune responses.

外泌体可提供肿瘤来源的抗原来诱导抗肿瘤的免疫反应。

We have already discussed the role of exosome in cancer therapy when answering the previous question.

在回答前一个问题时，我们已经讨论了外泌体在癌症治疗中的作用。

However, the more important role of exosome seems to be modulation of microenvironment by paracrine mechanisms.

然而，外泌体更重要的作用似乎是通过旁分泌机制调控微环境。