英语语法分析

But sometime earlier, it was a Yamen.

但是最早以前这可是一座衙门。

Admiral Yamen is 200 meters outside the Southwest Admiral Ding Yu's apartment.

提督衙门外西南200米处是水师提督丁汝昌的寓所。

This was the Northern Navy commander's office, or commonly known as the Navy Yamen.

这儿就是当年的北洋水师提督署，俗称水师衙门。