Variability : পরিবর্তনশীলতা; অনিত্যতা; পরিবর্তনীয়তা;
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Appropriate Prepositions
Dull of (বধির; কানে শুনে না): He is dull of hearing.
Object to (আপত্তি করা): He objected to my proposal.
Perfect for (সঠিক, মানানসই): The new book is perfect for you.
Point out (চিহ্নিত করা): Point out the mistakes from the book.
Refrain from (বিরত রাখা বা থাকা): I refrained him from smoking.
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Idioms
Far and wide (সর্বত্র): His fame spread far and wide.
In the wake of (ঠিক পরে): Police came in the wake of the accident.
In the long run (পরিণামে): You will have to suffer in the long run.
Lose heart (হতাশ হওয়া) — Do not lose heart in danger.
Run short (কমতি পড়া) —I ran short of money.