Cleanroom : ন্যূনতম ভুল করে একটি সফটওয়্যার উদ্ভাবন করার পদ্ধতি;
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Appropriate Prepositions
Apology for (কোনো কারনে ক্ষমা চাওয়া): Sajib should ask apology to her of his mistake.
Bask in(রোদ পোহানো): The boys and girls are basking in the sun right now.
Congenial to(উপযোগী): The atmosphere is congenial to your health.
Satisfied with (সন্তুষ্ট): The authoress was highly satisfied with Jerry.
Taste for (রুচি; পছন্দ): He has a great taste for music.
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Idioms
After all - (সব কথার পরেও): I rang and told her I couldn't come after all.
At one’s elbow (near at hand — হাতের কাছে – adv.) His private secretary is always at his elbow.
Fight shy (এড়িয়ে চলা): Why do you fight shy of your teacher?
In full swing (পুরোদমে): The school is in full swing after the vacation.
Slip of the pen (লেখায় অসতর্কতাবশত সামান্য ভুল): The mistake is due to a slip of the pen.