2．where可以引导非限制性定语从句。 Galileo lived in the city of Pisa，where there is a leaning tower about 180 feet high. 伽利略住在比萨城，那里有座大约180英尺高的斜塔。 3．关系副词where常可用“介词＋关系代词”构成的表示地点的介词短语代替。 The office where (at which) he works is not far from here.他工作的办公室离这儿不远。 Japan is the place where (in which) earthquakes frequently happen.日本是地震频繁爆发的地方。