北京
天坛是明清两代皇帝祭天、祈求五谷丰登的场所，是中国古代祭天建筑的顶峰之作，以其宏伟的建筑和巧妙的声学设计而闻名于世。
The Temple of Heaven is an imperial altar where emperors of the Ming and Qing dynasties worshipped heaven and prayed for good harvests. It is famous for its magnificent buildings and clever acoustic designs.
回音壁是皇穹宇的圆形围墙。因墙体坚硬光滑，是声波的良好反射体，又因圆周曲率精确，声波可沿墙面连续反射传播。
The Echo Wall is the circular surrounding wallof the Imperial Vault of Heaven. The hard and smoothwall in a perfect circumference constitutes an excellentreflecting body for the sound waves, which travel alongthe wall surface by continuous reflections.
如两人分立于东、西配殿后回音壁下，面对墙轻声对话，双方均能清晰听到，一呼一应，一问一答，妙趣横生。
If two persons stand by the wall behind the East Annex Hall and the West Annex Hall respectively and speak with their face toward north, they can hear each other's voice clearly.Calls and responses or asks and answers constitute a wonderful conversation.
责编：勾晓庆
特别声明：以上内容(如有图片或视频亦包括在内)为自媒体平台“网易号”用户上传并发布，本平台仅提供信息存储服务。
Notice: The content above (including the pictures and videos if any) is uploaded and posted by a user of NetEase Hao, which is a social media platform and only provides information storage services.
