Thermal mass flow sensor has unique constant temperature principium as mathematical model for measuring medium mass flow without compensation of temperature and pressure.
采用独特的恒温原理建立数学模型，测量出介质的质量流量，无须温度和压力补偿。
People with a large amount of lean muscle mass, such as athletes, can show a large body mass index without having an unhealthy level of fat.
但是肌肉发达的人（如运动员）体质指数比较大，但不会有多余的脂肪。
People with a large amount of lean muscle mass, such as athletes, can show a large body mass index without having an unhealthy level of fat.
但是肌肉发达的人（如运动员）体质指数比较大，但不会有多余的脂肪。
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