Echo Wall的用法和樣例：
例句
- This Echo Wall is just like the telephone.
這回音壁和電話(huà)一模一樣。 - The authors emphatically point out some famous acoustical phenomena inTiantan, on the basis of the study of the Four Famous Echo Architecutres in China.
在總結我國四大回音建筑聲學(xué)現象的基礎上，重點(diǎn)介紹天壇回音壁內幾個(gè)著(zhù)名的聲學(xué)現象。
