To prevent the soy sauce from having a strong vinegar taste (vinegar is dilute acetic acid), oxygen must BE kept, out of the fermentation tank.

为了防止酱油产生强烈的醋味(醋是稀释的乙酸)，必须要使发酵罐隔绝氧气。

youdao

To prevent the soy sauce from having a strong vinegar taste (vinegar is dilute acetic acid), oxygen must BE kept, out of the fermentation tank.

为了防止酱油产生强烈的醋味(醋是稀释的乙酸)，必须要使发酵罐隔绝氧气。

youdao