So this is a case where we have resonance structures, or we call this a resonance hybrid.

因此在这种情况下我们就有了共振结构，或者我们叫它共振杂化。

麻省理工公开课 - 化学原理课程节选

In some cases that backbone gets methylated and those regions of the DNA that are methylated get treated differently by the cell than unmethylated regions.

一些情况下,主链会甲基化,该甲基化区域的DNA,和未甲基化区域的DNA,会被细胞区别对待

耶鲁公开课 - 生物医学工程探索课程节选