悉尼歌剧院的英文名称是Sydney Opera House。它的来源是由于悉尼歌剧院的建筑外形像一座大型的歌剧院。例句：

The Sydney Opera House is one of Australia's most iconic landmarks. (悉尼歌剧院是澳大利亚最具标志性的地标之一。)

The Sydney Opera House is a UNESCO World Heritage site. (悉尼歌剧院是联合国教科文组织世界遗产地。)

The Sydney Opera House hosts many different kinds of performances, including operas, concerts, and plays. (悉尼歌剧院举办了许多不同类型的演出，包括歌剧、音乐会和戏剧。)