Self-preservation : আত্মারক্ষার সহজাত প্রবৃত্তি; আত্মসংরক্ষণ; আত্মরক্ষা;
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Appropriate Prepositions
Absent from(অনুপস্থিত থাকা): I was absent from the class yesterday.
Business with (ব্যবসা, কাজ): He is pleased to do business with you.
Enter into (আলোচনা করতে আরম্ভ করা): Let’s not enter into details at this stage.
Grasp at (আঁকড়িয়ে ধরা): He grasped me at my hand.
Perfect for (সঠিক, মানানসই): The new book is perfect for you.
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Idioms
All along - (সব সময়): I was present in the meeting all along.
In vogue (চালু): This custom is not in vogue at present.
Make hay while sun shines (ঝোপ বুঝে কোপ মারা) You should try to make hay while sun shines.
Slow coach (অলস): You cannot expect much from a slow coach.
With a view to (উদ্দেশ্য)- He goes to college with a view to attending the class.