This is electrostatics right here.

这一项是静电力的作用。

麻省理工公开课 - 固态化学导论课程节选

They're lipids but they also have a charged portion, a positively charged portion which interacts with DNA.

它虽然是脂类,但一部分带有电荷,其带有的正电荷将与DNA产生静电作用

耶鲁公开课 - 生物医学工程探索课程节选