Atomic mass : পারমাণবিক ভর;
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Appropriate Prepositions
Aim at(আঘাত করার জন্য লক্ষ্য স্থির করা): The hunter aimed at the tiger.
Hard of (কানে খাটো বা কম শোনা): Ratan is a hard of hearing.
Refer to (সিদ্ধান্তের জন্য প্রেরণ করা): The matter was referred to the Chairman for a decision.
Search for (সন্ধান করা): The police searched the halls of residence for arms.
Taste of (স্বাদ; অভিজ্ঞতা): They have had some taste of problems.
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Idioms
At liberty (free-মুক্ত-adj.) They are at liberty to go anywhere.
Burning question - (গুরুত্বপূর্ন বিষয়): Poverty problem is a burning question of our country.
Brown study (দিবাস্বপ্ন): The girl is absorbed in a brown study.
Run a risk (ঝুকি নেয়া) — He ran a risk to save his life.
Swan-song (অন্তিম গীত, শেষ কর্ম): This writing is the swan song of Kazi Nazrul islam.