State of the art : প্রযুক্তির বর্তমান ব আধুনিকতম অবস্থা;
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state of the art  stateoftheart  See Words Also In
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Appropriate Prepositions
Authority on(বিশেষজ্ঞ পন্ডিত): Kamal was an authority on English literature.
Cope with(সামলানো বা পেরে উঠা): They cannot cope with the situation.
Look over (পরীক্ষা করা): He was looking over the answer scripts.
Road to (উপায়/ রাস্তা): There is no easy road to learning.
Sick of (ক্লান্ত): He is sick of this idle life.
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Idioms
At a low ebb (in an unfavorable situation প্রতিকুল অবস্থায়, ভাটির মুখে) The popularity of this singer is now at a low ebb.
Round the clock (সমস্ত দিন): He is working round the clock.
Three R's (প্রাথমিক শিক্ষা)— He has not yet learnt the three R's.
Three score (ষাট): He is happy as his brother got three score.
Up to (পর্যন্ত) - I have done the exercises up to page 40.