In black and white ( লিখিতভাবে ) Put down the statement in black and white.
To and fro ( এদিন-ওদিক ) Being unable to make up his mind the man is walking to and fro.
Weal and woe ( সুখ-দুঃখ ) Human life is full of weal and woe.
Up and downs ( উন্থানপতন ) There are ups and downs in a man's life.
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.
By leaps and bounds ( অতি দ্রুতগতিতে ) The population of Bangladesh is increasing by leaps and bounds.