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含量不是物理量。含量作为习惯用语，其概念较模糊，如 B物含水 70％，究竟是指水的质量与 B物的质量之比，水的体积与 B物的体积之比，还是指水的质量与 B物 100ml的体积之比，易引起混乱。按习惯，含量常指的物理量有量纲一的量：质量分数 (ω =mBm/混、体积分数φ =ν B/ν?
Content is not a physical quantity. Content as an idiom, the concept of fuzzy, such as 70% water content of B, what is the quality of water and B mass ratio, the volume of water and B volume ratio, or the quality of water and B 100ml volume ratio, easy to cause confusion. According to the habit, the content often refers to the amount of the amount of one of the physical quantity: mass fraction (ω = mBm / mixed, volume fraction φ = ν B / ν?