Exchange ratio : বিনিময় অনুপাত;
Related Words
exchange greetings  exchange rate  exchange ratio  See Words Also In
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Appropriate Prepositions
Abide by(মেনে চলা): We must abide by the rules of discipline.
Anxious about (কোনো কিছুর ব্যাপারে চিন্তিত বা উদ্বিগ্ন): Karim is anxious about his father’s death. Karim is anxious for getting a job.
Burst out a laughter(হাসিতে ফেটে পড়া) He bursts out a laughter.
Die of, for, from (মারা যাওয়া): He died of cholera. He died for his country. He died from an injury.
Enter into (কোনো কিছুতে আবদ্ধ হওয়া): pma entered into a new agreement.
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Idioms
ABC - (প্রাথমিক জ্ঞান): I don't know the ABC of politics.
All up with - (পুরোপুরি, হতাশ, সব আশা শেষ): If we can't, it's all up with the councillor.
At times (মাঝে মাঝে): He at times comes here.
Turn a deaf ear to (pay no attention, প্রত্যাখান করা) —He turned a deaf ear to my proposal.
Widow’s mite (দরিদ্রের ক্ষুদ্র দান): A windows mite is no less important than a large contribution of a rich man.