出于贮藏的需要，加工过的食品及罐装食品酸性尤其高，联邦法规对此也有相应的高酸规定，考夫曼博士说。

Processed and bottled foods are particularly acidic because of federal rules requiring high acidity as a preservative, Dr. Koufman says.

youdao

出于贮藏的需要，加工过的食品及罐装食品酸性尤其高，联邦法规对此也有相应的高酸规定，考夫曼博士说。

Processed and bottled foods are particularly acidic because of federal rules requiring high acidity as a preservative, Dr. Koufman says.

youdao