Alpha particle : হিলিয়াম পরমাণুর কেন্দ্রক;
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Appropriate Prepositions
Ashamed of(লজ্জিত): Nandini was ashamed of his wrong-doing.
Effect of (প্রভাব): The effect of corruption is very harmful for our society.
Plead for (ওকালতি করা): He pleads for justice.
Rid of (মুক্তি দেওয়া): He will get rid of troubles soon.
Shout at (চিৎকার করে ডাকা): Do not shout at your parents.
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Idioms
At last (in the end – অবশেষে) He tried hard, and at last, succeeded in achieving his goal.
Art and part (অভিসন্ধি ও সম্পাদন) We have no art and part in his affairs.
At death’s door (at the point of death- মৃত্যুর দ্বারে) The patient is now at death’s door.
Crocodile tears (মায়াকান্না): He shed crocodile tears at our misery.
To the point (সঠিক) - The boy answered the question to the point.