Folic acid, a B vitamin, is added to food in many countries to help prevent health problems.

叶酸是一种B族维生素，这一元素被很多国家添加到食物中以预防疾病。

Getting enough of this vitamin is important for preserving, Bonus as you get older.

摄取足够的这种维生素对于保存很重要，随着年龄的增长还有好处。

A " vitamin" (vitamin) is something that is found in a plant or animal foods, and needs to be eaten for good health.

“维生素” （维生素）是存在于植物或动物食品中的物质，需要食用才能保持健康。