Radioactivity : তেজস্ক্রিয়তা;
Related Words
radio activity radio-activity radioactivitySee Words Also In
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Appropriate Prepositions
Ask for (কোনো কিছু চাওয়া): Do not ask him for any help because he doesn’t like to help anyone.
Careful of (সতর্ক): He is very careful of his fault.
Caution against(সাবধান): Take all cautions against the danger.
Deal in (কোনো কিছুর ব্যবসা করা): They deal in green vegetables.
Easy of (সরল): The teacher is easy of approach.
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Idioms
All along - (সব সময়): I was present in the meeting all along.
Lump sum (এক কালীন) — He gave us lump sum money.
On the whole (মোটের ওপর): On the whole, his conduct is good.
To the point (সঠিক) - The boy answered the question to the point.
Three score (ষাট): He is happy as his brother got three score.