Definition
Used to emphasize that something is absolutely certain or will definitely happen.
确定，千真万确
He will succeed if he works hard, as sure as eggs is eggs.
只要他努力，他就会成功，这是确定无疑的。
You will receive the package tomorrow, as sure as eggs is eggs.
你明天一定会收到包裹，这是确定无疑的。
They will collaborate again, as sure as eggs is eggs.
他们一定会再次合作，这是确定无疑的。