A blessing in disguise( বিপরীতে হিত ; প্রথমে খারাপ হিসেবে মনে হলেও পরবর্তীতে ভালো হয় ) Sam's motorcycle accident was a blessing in disguise because he got enough insurance money.
In the nick of time( ঠিক সময়ে ) The school team arrived in the nick of time.
A black sheep( কুলাঙ্গার ) Tom is a black sheep in their family
Pros and cons( খুঁটিনাটি ) You should consider the Pros and cons of the system.
At a stretch( একটানা ) He can run ten miles at a stretch.