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钙对人的肌体是不可缺少的，在人生的不同时期钙或多或少都是必须的。钙确保骨的结实程度，并参与人体众多机制的运作（血液的凝固，肌肉的收缩……）。我们的骨骼储备着2公斤的钙以供机体的需要。几个重要的阶段是食物（奶制品）向我们提供着我们身体日常所需要的钙。但是，当
Calcium is indispensable to the human body, and calcium is more or less necessary at different times in life. Calcium ensures the firmness of bone and participates in the functioning of many mechanisms in the body (blood coagulation, muscle contraction ...). Our bones reserve 2 kg of calcium for the body’s needs. A couple of important phases are that food (dairy products) provides us with the calcium that our body needs daily. However, when