请问该如何回答！
. 请问这是什么意思啊，审稿人错误？血液一般是带负电荷啊，请问应该怎么回答，谢谢！Since negatively charged nanoparticles can interact with positively charged blood components, a surface charge of around -31.2 mV can represent a serious drawback of the developed drug delivery system.
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