“耳中的”的英语

这是 七十五 岁 、戴助听器老人耳中的同一辆卡车.This is what the same truck sounds like to a 75 - year - man with a hearing aid.戴一小时的耳机,耳中的细菌可以增加700倍?Wearing headphones for an hour will increase the bacteria in ear by 700 times....