Definition
Refers to something that is identical or a situation that is alike.
相同的事情
Although they use the same tools, their results are not the same thing.
虽然他们使用相同的工具，但他们的结果并不是一回事。
For him, love and infatuation are not the same thing.
对他来说，爱和迷恋并不是一回事。
Success and happiness are not always the same thing.
成功和幸福并不总是一回事。