Relative density : আপেক্ষিক ঘনত্ব;
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Appropriate Prepositions
Agree with, on, to(একমত হওয়া): My father agreed with me on this point, but he did not agree to my proposal to set up a canteen.
Attention to(মনোযোগ): He has no attention to his studies.
Business with (ব্যবসা, কাজ): He is pleased to do business with you.
Cause of(কারণ): Industry is the cause of your success.
Despair of (নিরাশ হওয়া): Do not despair of further improvement.
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Idioms
At a round rate (at the fixed price – নির্ধারিত মূল্যে) Things are selling in the shop at a round rate.
Easy and free (অমায়িক): The boy is easy and free, so he has many friends.
Foul play (অসদাচারণ করা): We feared that he had met with foul play.
Take into account (বিবেচনা করা): Your activities should be taken into account.
Up to (পর্যন্ত) - I have done the exercises up to page 40.