过去两年来，我耗费大量时间来研究公司责任，并编写了一本关于公司责任的教科书。

Over the last two years, I spent a significant amount of time researching and writing a textbook on corporate responsibility.

youdao

过去两年来，我耗费大量时间来研究公司责任，并编写了一本关于公司责任的教科书。

Over the last two years, I spent a significant amount of time researching and writing a textbook on corporate responsibility.

youdao