relative density

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relative density

BrE

/ˌrelətɪv ˈdensəti/

NAmE

/ˌrelətɪv ˈdensəti/

(

also speˌcific ˈgravity

)

noun

[uncountable]

(

chemistry 化学

)

the mass of a substance divided by the mass of the same volume of water or air 相对密度