定義 / Definition
［noun］
・the number of people or things in a place when compared with the size of the place; the relationship between the weight of a substance and its size
— その他 例文 —
The density of water is higher than the density of oil.
水の密度は油の密度よりも高いです
The density of a material is its mass per unit volume.
物質の密度は、その物質の単位体積当たりの質量である。
