In the long run( পরিশেষে ) You will have to suffer in the long run.
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.
Three R's( প্রাথমিক শিক্ষা ) The majority of our people have not yet learnt the three R's.
At a low ebb( নিম্নমুখী ) His fame is at a low ebb now.
Up and downs ( উন্থানপতন ) There are ups and downs in a man's life.