Even the hostess, with bare feet, uncombed hair, and dressed in a garment of doubtful color, received the guests grumblingly.

即使女店主也光着脚、头发蓬乱、穿着一件很脏的的衣服，嘟囔着接待客人。

I know many readers will grumblingly protest that they're just not good at math!

我知道很多读者会发牢骚抗议说，他们只是不擅长数学而已！