Radio activity : তেজস্ক্রিয়তা;
Related Words
radio activity radio-activity radioactivitySee Words Also In
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Appropriate Prepositions
Careful of (সতর্ক): He is very careful of his fault.
Catch at(ধরা): A drowning man catches at a straw.
Object to (আপত্তি করা): He objected to my proposal.
Repent on (নির্ভরশীল): He is repent on his parents.
Welcome to (স্বাগত জানানো): You are welcome to our new office.
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Idioms
At a round rate (at the fixed price – নির্ধারিত মূল্যে) Things are selling in the shop at a round rate.
At one’s elbow (near at hand — হাতের কাছে – adv.) His private secretary is always at his elbow.
Bear in mind (remember— মনে রাখা —V): You should also bear in mind the additional costs of the mortgage.
See to (বিবেচনা করা)— Can you see to it that everyone gets a copy of this memo?
Under age (অপ্রাপ্ত বয়স্ক)- He could not cast his vote because he was under age.