The vitamins are named by letters of the alphabet.
Vitamin A is needed by the eyes. There's Vitamin A in milk, butter and green vegetable. It can be kept by the body.
Vitamin B can't be kept. It must be given all the time by some of the food we eat. The skins of grain of all sorts have Vitamin B in them.
Vitamin C is very important to the body. Without it men's teeth become loose and their arms and legs weak. Lemons, oranges and tomatoes have Vitamin C in them.
Vitamin D is the sun vitamin. We get it in milk and eggs and from sunlight on our skin. There're other Vitamins, but these A, B, C and D are the most important.

The vitamins are named by letters of the alphabet.
维生素是根据字母表里字母的顺序命名的。

Vitamin A is needed by the eyes. There's Vitamin A in milk, butter and green vegetable. It can be kept by the body.
维生素A是眼睛需要的。牛奶、奶油和绿色蔬菜中含有维生素A。它能够在人体中（自身进行）储存。

Vitamin B can't be kept. It must be given all the time by some of the food we eat. The skins of grain of all sorts have Vitamin B in them.
维生素B则不能在人体中自身进行储存。它只能是通过我们吃的大多数食物获得。各种粮食的表皮中都含有维生素B。


Vitamin C is very important to the body. Without it men's teeth become loose and their arms and legs weak. Lemons, oranges and tomatoes have Vitamin C in them.
维生素C对人体非常重要。没有它，（我们的）牙齿就会变松，四肢就会瘦弱。柠檬、橘子和西红柿中都含有维生素C。

Vitamin D is the sun vitamin. We get it in milk and eggs and from sunlight on our skin. There're other Vitamins, but these A, B, C and D are the most important.
维生素D也称太阳维生素。我们可以从牛奶和鸡蛋以及射到我们皮肤的阳光中得到它。还有其他的维生素，但是维生素A、B、C、D是最重要的几种。