Long standing : দীর্ঘকালস্থায়ী;
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long standing  long-standing  longstanding  See 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.
Composed of(তৈরী): This medicine is composed of vitamins and minerals.
Congenial to(উপযোগী): The atmosphere is congenial to your health.
Effect of (প্রভাব): The effect of corruption is very harmful for our society.
Quick at (চটপটে): A cashier must be quick at figures.
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Idioms
Arm in arm (পরস্পর সম্পর্কিত বিষয়) All good people should live arm in arm with one another.
Base born (নীচ বংশজাত, খারাপ জাত—adj.) He is a base born person; I cannot go along well with him.
Ins and out (খুঁটিনাটি): I know ins and outs of this file.
Make hay while sun shines (ঝোপ বুঝে কোপ মারা) You should try to make hay while sun shines.
Pack of lies (ডাঁহা মিথ্যা)—He told pack of lies to prove himself innocent.