它的名字来源于它的声学现象——站在这边轻声的耳语可以从另一边清楚的听到。

It is named for its acoustical properties - a whisper spoken at one end can be heard clearly from the other.

youdao

它的名字来源于它的声学现象——站在这边轻声的耳语可以从另一边清楚的听到。

It is named for its acoustical properties - a whisper spoken at one end can be heard clearly from the other.

youdao