Definition
in a strict or precise sense; accurately speaking.
严格来说；确切地说
Properly speaking, this wasn't a formal meeting but an informal discussion.
严格来说，这不是一个正式会议，而是一次非正式讨论。
This product, properly speaking, isn't brand new; it's actually refurbished.
确切地说，这款产品并非全新，而是翻新的。
Properly speaking, she is not my colleague; we just work on the same project.
严格来说，她不是我的同事，我们只是同一个项目的成员。