Harmonic series : বিপরীত শ্রেণী; বিপরীত শ্রেণি;
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Appropriate Prepositions
Depend upon (নিশ্চিত থাকা, আস্থা রাখা): Sumi depended upon his word.
Dwell upon (আলোচনা করা): They dwell long upon the matter.
Eager for, about (একাগ্র): The students for this school are eager for knowledge. The teacher is eager about the success of his students.
Inferior to (নীচু/হীন): He is inferior to his neighbor.
Work with (কারো সাথে কাজ করা): They will be working with me on the new project.
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Idioms
At home (comfortable— আরাম) He feels at home in Dhaka now.
Lose one’s heart (প্রেমে পড়া) — He lost his heart to the girl.
Pick a quarrel (ঝগড়া করা)—Do not pick a quarrel.
Rank and file (সাধারণ লোক): We should pay attention to the rank and file of the country.
Run a risk (ঝুকি নেয়া) — He ran a risk to save his life.