Pros and cons( খুঁটিনাটি ) You should consider the Pros and cons of the system.
Nip in the bud( অঙ্কুরে বিনষ্ট করা ) All his hopes were nipped in the bud.
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.
Build castles in the air( আকাশ কুসুম চিন্তা করা ) Don't idle away your time in building castles in the air.
Slow coach ( অলস প্রকৃতির লোক ) You cannot expect much from a slow coach like him.
In the long run( পরিশেষে ) You will have to suffer in the long run.