题目内容

阅读下面短文,将短文中画线部分的句子译成中文。

Building strong bones needs calcium(钙)vitamin D and exercise starting in childhood. Here are guidelines on how much calcium and vitamins youngsters need:

1.Young children should have about 800 milligrams a dayBut between ages 9 and 18, when bone growth speeds up, that should almost double. That's about three cups of milk together with calcium-rich foods, such as broccoli and cheese.

Children find teenagers need at least 200 international units of vitamin D. Milk and orange juice are often fortified(强化) with this vitamin; a few other, foods contain it. Sunlight is a major source. 2.About 10 to 15 minutes of sunshine weekly is enough for many children. The goal is to get just enough sun for vitamin D production, while avoiding too much of its skin-damaging rays.

Children of all ages need about an hour of physical activity most days.Weight--bearing(承载)exercises strengthen bone, anything from team sports like soccer to simply jumping ropes or running around. 3.The use is for tile arms or lees to bear all the body's weight

1.小孩每天应该摄入800毫克的钙

2.对许多孩子来说,每周晒太阳10至15分钟就足够了

3.胳膊或腿的用途就是承载整个身体的重量

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