Radio activity : তেজস্ক্রিয়তা;
Related Words
radio activity radio-activity radioactivitySee Words Also In
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Appropriate Prepositions
Annoyed with(ব্যক্তির সাথে বিরক্ত হওয়া): I am annoyed with him.
Careless of(অসতর্ক): Do not be careless of your health.
Caution against(সাবধান): Take all cautions against the danger.
Grateful to (কৃতজ্ঞ): We should be grateful to our teachers.
Sorry for (দুঃখিত): He is sorry for his misdeeds.
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Idioms
On the whole (মোটের ওপর): On the whole, his conduct is good.
Pass sth/sb off as sth/sb (মিথ্যা পরিচয় দেয়া; Pretend – ভান করা): They were trying to pass off these shirts as genuine Armani.
Slow coach (অলস): You cannot expect much from a slow coach.
Three R's (প্রাথমিক শিক্ষা)— He has not yet learnt the three R's.
With might and main (যথা শক্তি দিয়ে) —He tried with might and main to help me.