The research was done by doctors from the Harvard School of Public Health, Harvard University, Boston, USA.

这项研究是由美国波士顿哈佛大学哈佛公共卫生学院的博士完成的。

youdao

The research was done by doctors from the Harvard School of Public Health, Harvard University, Boston, USA.

这项研究是由美国波士顿哈佛大学哈佛公共卫生学院的博士完成的。

youdao