求翻译：　回音壁围墙表面比较光滑,非常有利于声音的反射,而且在回音壁圆心处有一块铺在地上的石块,站在上面喊一声,可以听到三次回声,因此称它为三音石,这也是此景点的奥妙之处.是什么意思？

Whispering gallery wall surface is smooth, the sound is very conducive to reflection, but also in the whispering gallery has a shop at the center of a circle of stones on the ground, standing above the call out, you can hear the echo times, so call it the three-tone stone, which This attraction is a

echo wall surface relatively smooth surface, wall of sound is very conducive to reflection, but also in the reverberation raceway wall there was a piece of stone on the floor, and stood on it, you can hear a loud cry 3 times, and therefore it is called echo audio 3 stone, this is also the attraction

　The Echo Wall fence surface quite is smooth, is extremely advantageous to the sound reflection, moreover has in the Echo Wall center of circle spreads together in the ground stone, stands in above shouted, may hear three times the echo, therefore called it is three sound stones, this also is the th

　Whispering wall surface is relatively smooth, very conducive to reflection of the sound, and the whispering gallery there is a stone laying on the floor at the circle Center, standing up to shout a loud, ECHO is heard three times, so we call it sanyinshi, which is also the mystery of this place.

　Whispering wall surface is relatively smooth, very conducive to reflection of the sound, and the whispering gallery there is a stone laying on the floor at the circle Center, standing up to shout a loud, ECHO is heard three times, so we call it sanyinshi, which is also the mystery of this place.