在桌边吃饭的英文表达是 "to eat at the table."

这个表达的来源是很直接的，就是指在桌子旁边吃饭。

一些英文例句和中文翻译如下：

"I always eat at the table, even when I'm by myself." (我总是在桌子边吃饭，即使是独自一人。)
"It's important to eat at the table as a family, to have a sense of togetherness." (作为一家人在桌子边吃饭很重要，可以让我们有一种团结的感觉。)
"Eating at the table helps me to be more mindful of what I'm eating, rather than eating on the couch while watching TV." (在桌子边吃饭能让我更加注意我在吃什么，而不是坐在沙发上看电视时吃东西。)