1 sentence

1. 来自我们正前方或正后方的声音会同时到达双耳。

   lái​zì wǒ​men zhèng qián​fāng huò zhèng hòu​fāng de shēng​yīn huì tóng​shí dào​dá shuāng ěr.

   Sounds located directly in front of or behind us will reach both ears simultaneously.

   Source: CCMatrix