题目

英语翻译
任何有障碍的地方都能产生回音,但我们日常生活中却不能经常听到是有原因的：声的传播速度是340米/秒.而人耳能够把两个声音分辨出来所需要的时间最短为0.1秒.也就是说从你的原声声音停止后的0.1秒之后才能听到回声.所以说听到回声的基本条件就是人距离障碍物大于或等于17米的时候,你才能把原声与回声2者区分开来,空阔的屋子或距离高墙远以及大山之中就经常能够听到回声,而且听到回声的速度随着人与障碍物之间的远近的改变而改变.但如果你距离的太远由于声波的分散你也就只能听到原声了

提问时间：2021-11-26

答案

Any have stumbling places can produce echo,but our daily life in can't through have reason often heard:The dissemination speed of the voice is 340 meters/ per second.But person's ear can make twos distinguishing time needed orotund the most short is 0.1.Is also say from your original voice the voice was stop behind of 0.1 then can hear echo after.So say basic condition of hearing the echo be the person is big apart from the stumbling block in or be equal to 17 meters of time,you then can open original voice and echo 2 distinctions,open and spacious house or be apart from a high wall far and Tashan in usually can hear echo,and hear the speed of echo the far near change is along with of the person and the stumbling block but change.But if you are too far apart from because the voice wave scatters you also can hear an original voice