Harmonic series : বিপরীত শ্রেণী; বিপরীত শ্রেণি;
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Appropriate Prepositions
Avail (oneself) of(সুযোগের স্বব্যবহার করা): I shall avail myself of the first trip to London tomorrow.
Cause of(কারণ): Industry is the cause of your success.
Feed with (কোনো কিছু খাওয়া): They feed the cow with grass.
Grasp at (আঁকড়িয়ে ধরা): He grasped me at my hand.
Recover from (সুস্থ হওয়া; পূর্ব অবস্থায় ফিরে আসা): The patient has not yet recovered from his severe illness.
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Idioms
As a rule (নিয়ম অনুসারে.) As a rule, she kept silent in the meeting.
Bad book (disfavour-খারাপ নজর —n) The secretary has fallen in the bad book of the manager.
Pave the way (সুপ্রসন্ন করা) – I am sure I can pave the way for your success.
Well up (সুপন্ডিত)- Dr. Shahidullah was well-up in Bengali language.
Yellow dog (হীন ব্যক্তি) - A yellow dog is always hated by all.