Storm density的用法和樣例：
例句
- The stomatal density and stomatal index had little taxonomical significance among the six genera.However, the two characters might be useful for species identification.
氣孔密度和氣孔指數在屬間的分類意義不明顯，但在屬內種間的分類上具有一定價值。 - The results showed that the ploidy level had a significantly positive correlation with the stoma diameter, but a negtive correlation with the stoma density.
結果表明，紅掌倍性與氣孔長度呈顯著正相關，而與氣孔密度呈顯著負相關。
