YOU SAID:
Ventilation exists because ventilation is real because ventilation can visibly be heard?
INTO JAPANESE
換気が存在するのは、換気が目に見えるから聞こえるからです。
BACK INTO ENGLISH
Ventilation exists because it is visible and audible.
INTO JAPANESE
換気は目に見えて聞こえるから存在します。
BACK INTO ENGLISH
Ventilation exists because it is visible and audible.
This is a real translation party!