Finally, the remaining amine groups are acetylated to ensure that the complex particles do not bear any surface charges. 最后，科学家将剩余的氨基进行乙酰化，这保证了复杂粒子不会受到表面电荷影响。
These surface charges partially nullify the effect of the charges on the metal plates. 这些表面电荷部分地抵消金属极板上电荷的作用。
