Sound in the air
空谷传声───Sound in the air
clear mountain air exaggerates every exterior sound so that the sheep in the pen a hundred meters away sound as if they have surrounded the yurt.───山上清新的空气夸大了每一声室外的声响，所以百米外羊圈里的羊叫听起来好像它们已经包围了这个蒙古包。
This system can realize directional propagation of sound in the air, and it is an emerging technology with extensive applications.───该系统能够使声音在空气中实现定向传播，是一种有着广泛应用前景的新兴技术。
Sound is conducted through steel in the same manner as through air.───声音通过钢的传导方式和在空气中的传导方式一样。
Suddenly she heard a whirring and rushing sound in the air, and the dwarf said, "The lord ravens are flying home now. "───忽然，她听到空中传来了翅膀拍击的声音和呱呱的叫声。小矮人马上说道：「我的主人们回来了。」
Transmission of Sound in the Air───声音在空气中的传播
A cold sound in the air───空中有冰冷的声音
There was a tearing sound in the air as a gun was fired.