在英语中，与此同时通常可以用"at the same time"或"while"来表达。例如：

At the same time：

I'm looking forward to seeing you again soon, and at the same time, I'm feeling a little nervous about it.

She's happy about the promotion, but at the same time, she's worried about the increased responsibility.

While：

I'm going to make dinner while you take care of the kids.

While I was at the store, I saw your sister.

关于这两个表达的来源，"at the same time"可以追溯到中世纪，而"while"可以追溯到古英语时期。两者都是古英语的词根的变体，表达的意思是同时进行。