牙结石—如果菌斑呆的时间足够长，它就开始矿化变硬形成牙石或牙垢，因为菌斑从唾液中吸收了钙，磷和其他矿物质。
Calculus - If left alone long enough, plaque begins to mineralize and harden into calculus or tartar because the plaque absorbs calcium, phosphorus and other minerals from saliva.
使用可在加压下测定着火点的装置，研究了煤化程度、煤中矿物质和煤焦干馏温度对煤或煤焦的催化着火的影响。
The effects of coal rank, pyrolytic temperature of coal and mineral matter in coals or chars on their ignition temperature were determined.
研究表明：煤的孔隙特征主要取决于煤化程度、显微煤岩组份、矿物质含量和断裂破坏强度。
It has been found that the pore characteristics of lump coal mainly depend on degree of coalification, types of macerals, content of inorganic matters and intensity of fissuring.
其成矿物质主要来源于矿区东北部的姑婆山与乌羊山花岗岩体及接触带的各类含锡原生矿床或矿化点，尤其与矽卡岩型锡石矿床关系最为密切。
Materials aer derived mainly fromGuposhan granite bodies in the northeast of the Sn deposit and their contactmetamorphic zone. Especially, they are closely related to the skarn cassteriteore deposit.
增加了麦饭石和矿化料，水在净化的同时，溶进了矿物质和微量元素，长期饮用有益身体健康。
The mater, with the addition of medical stone and mineralization material, and dissolved with minerals and trace elements when purified beneficial for health if drink for a long period.
增加了麦饭石和矿化料，水在净化的同时，溶进了矿物质和微量元素，长期饮用有益身体健康。
The mater, with the addition of medical stone and mineralization material, and dissolved with minerals and trace elements when purified beneficial for health if drink for a long period.
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