仅在最近的两周中，预防医学的两个台柱子不幸倒掉了。

In just the last two months, two pillars of preventive medicine fell.

youdao

仅在最近的两周中，预防医学的两个台柱子不幸倒掉了。

In just the last two months, two pillars of preventive medicine fell.

youdao