on the button

• 非正式表达，表示完全正确、准确，或正好在指定时间。

An informal expression meaning exactly correct, precisely accurate, or at the exact time specified.

1. Exactly correct or accurateB2informalamerican

   Used to describe something that is precisely right, accurate, or exactly as expected.

   正中要害

   • Your guess was right on the button.
   • The timing of his arrival was on the button.
   • Her answer was on the button, matching the solution perfectly.

2. At exactly the right timeB2informalamerican

   Used to describe something happening at the precise moment it should.

   正好准时

   • The train arrived at 3:00 PM on the button.
   • He finished his speech on the button, just as the bell rang.
   • The meeting started on the button, with no delays.