Alpha particle : হিলিয়াম পরমাণুর কেন্দ্রক;
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Appropriate Prepositions
Abide in(বাস করা): I abide in Dhaka with my family.
Affection for(স্নেহ): She has a great affection for the child.
Consist in (কোনো কিছু মধ্য বিদ্যমান থাকা): Happiness consists in contentment.
Hit upon (পরিকল্পনা নেয়া): Rahim hit upon a new plan.
Repent of (অনুতাপ করা): I repented of my past.
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Idioms
Bird’s eye view - (ভাসা ভাসা দৃশ্য, হালকাভাবে দর্শন): We took a bird’s eye view of the scenery.
Hard nut to crack (কঠিন সমস্যা): The problem of adult education is really hard nut to crack.
Milk and honey – (প্রাচুর্য)- He lives with milk and honey.
Set free (মুক্ত করা): The prisoners were set free.
Weal and woe (joy and sorrow, সুখ দঃখ) —Human life is full of weal and woe.