Wave theory : তরঙ্গতত্ত্ব;
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Appropriate Prepositions
Eager for, about (একাগ্র): The students for this school are eager for knowledge. The teacher is eager about the success of his students.
Grasp at (আঁকড়িয়ে ধরা): He grasped me at my hand.
Popte in, to (মার্জিত): We must be popte in our dealings. One should be popte to
Qualified for (যোগ্য প্রতিপন্ন হওয়া): No candidate was properly qualified for the post.
Sorry for (দুঃখিত): He is sorry for his misdeeds.
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Idioms
At the latest (খুব বেশি দেরী হলে) He will arrive here at 5 p. m. at the latest.
Brown study (দিবাস্বপ্ন): The girl is absorbed in a brown study.
Make head or tail – (মাথামুন্ডু বুঝা) – I cannot make head or tail of what you say.
Riding for a fall (বেপরোয়াভাবে কাজ করা- to act recklessly): He rides for a fall in the election.
Swan-song (অন্তিম গীত, শেষ কর্ম): This writing is the swan song of Kazi Nazrul islam.