So parts of the city still see flooding: like St.  Mark's Square which becomes a rather grand lake whenever the tide goes more than 80 cm above  its regular level.

因此，这座城市的部分地区仍然会发生洪水：比如圣马可广场，每当潮水超过正常水位 80 厘米时，它就会变成一个相当大的湖泊。