Bad table manners are like any lapse in etiquette - when the problem is coming from someone else, it's immediately apparent, but if you're the offender, you probably don't even realize it's an issue.

餐桌上的坏习惯，像其他的礼节过失一样——当错误出现在别人身上的时候，很容易就会发现，然而一旦自己成了当事人，你甚至都意识不到自己有这个问题。

youdao