When a bottle of vinegar is opened , vinegar mother may develop , which is considered harmless and can be removed by filtering .
When a bottle of vinegar is opened , mother of vinegar may develop . It is considered harmless and can be removed by filtering .
When a bottle of vinegar is opened , mother of vinegar may develop . It is considered harmless and can be removed by filtering .
解释一下这句话: When a bottle of vinegar is opened , vinegar mother may develop , which is considered harmless and can be removed by filtering . 输出: