surface electrical density的用法和樣例：
例句
- These surface charges partially nullify the effect of the charges on the metal plates.
這些表面電荷部分地抵消金屬極板上電荷的作用。 - Finally, the remaining amine groups are acetylated to ensure that the complex particles do not bear any surface charges.
最後，科學家將剩餘的氨基進行乙醯化，這保證了複雜粒子不會受到表面電荷影響。
