Adding-Calcium fly ash is made of liquid slag from cyclone furnace and fly ash from electric precipitator by means of grinding and ageing processes.

增钙粉是以旋风炉排出的增钙液态渣、电除尘灰为主要原料，经过粉磨、陈化等项工艺处理制得。

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They are not due to the ordinary processes of ageing.

BBC: Straw's statement in full

Much of the research into ageing aims to get a better understanding of the biological processes which trigger the steady deterioration in the cells that make up our bodies.

BBC: How old can we get?