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Every time we walk, sit down or hold a book, we are using our bones.
每當我們走路、坐下或者拿書的時候，我們都要用到骨骼。
Bones are important because they support our bodies and help us move freely.
骨骼十分重要，這是因為它支撐著我們的身體，并且能讓我們運動自如。
Although they are very light, bones are strong enough to support our weight.
雖然骨骼的分量很輕，但是骨骼的強大足以承載我們的體重。
Bones are hard on the outside, but they are soft on the inside.
骨骼的表面很堅硬，但是骨髓卻很柔軟。
The soft part of the bone makes our blood. Blood carries nutrients through our bodies.
骨髓可以造血。血液把營養輸送的身體需要的部分。
It also helps move waste materials away so our bodies can stay healthy.
它同時也能清除內體垃圾，使我們的身體保持健康。
Calcium makes our bones solid, so we need to get enough of it each day.
鈣能使骨骼變得更堅硬，所以我們的身體每天要吸收充足的鈣。
We can get calcium easily from milk, some vegetables and other foods.
我們可以輕而易舉地從牛奶、某種蔬菜以及其他食物中獲取鈣。
Vitamin D is also important because it helps calcium work well in our bodies.
維他命D同樣也很重要，因為它能讓鈣質被我們身體充分地吸收。
Although we get vitamin D from food like fish and eggs, we can also get it from the sun!
雖然我們可以從魚類、蛋類等食物中獲得維他命D，但是我們也能從陽光中獲得維他命D。
Try to get a bit of sun every day so you can have healthier bones!
為了身體健康，你需要經常曬曬太陽。
Exercise improves our bone health too, so make it a habit.
鍛煉也有益于骨骼健康，所以你也需要經常鍛煉身體。
Running, jumping and dancing are all good exercise, but even daily activities like walking and climbing stairs can help keep our bones healthy and strong!
跑步、跳高、跳舞都是不錯的運動項目，甚至每天的步行和爬樓梯這樣的日常運動也有利于骨骼健壯。
