n.可变更性，可更改性...

The true of sample is very important due to the volatility and alterability of light hydrocarbon.由于轻芳烃有一定的挥发性和变异性,样品的保真非常重要....

alterability的音标：alterability的英式发音音标为：[ɒltərə'bɪlɪtɪ]alterability的美式发音音标为：[ɒltərə'bɪlɪtɪ]...