Experience suggests that snotty-nosed toddlers pass their infections on to family members more frequently than older children do.

根据经验来说挂着鼻涕的学步顽童比大一些的孩子更容易把疾病传染给家里其他人。

There was nothing in the unwritten rulebook of family responsibility that required her to raise some little snotty-nosed great-grandkid.

关于家庭职责不成文的规定中没有要求她再带大我这个鼻涕虫似的曾孙女。