Altimetry : উচ্চতামিতি; উচ্চতা পরিমাপ করার বৈজ্ঞানিক পদ্ধতি;
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altimeter  altimetry  See Words Also In
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Appropriate Prepositions
Avail (oneself) of(সুযোগের স্বব্যবহার করা): I shall avail myself of the first trip to London tomorrow.
Die by (দূর্ঘটনা বা অপঘাতে মরা/কোন কিছু দ্বারা মারা যাওয়া): He died by a road accident.
Die of, for, from (মারা যাওয়া): He died of cholera. He died for his country. He died from an injury.
Married to (বিবাহিত): Salma was married to a Govt. Officer.
Smile on/upon (অনুগ্রহ করা): Fortune smiles on/upon the brave.
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Idioms
At a low ebb (in an unfavorable situation প্রতিকুল অবস্থায়, ভাটির মুখে) The popularity of this singer is now at a low ebb.
At the eleventh hour (at the last moment-শেষ মুহুর্তে adv.) The patient was in a dangerous condition and the doctor came at the eleventh hour.
Pave the way (সুপ্রসন্ন করা) – I am sure I can pave the way for your success.
Run high (বেড়ে যাওয়া) —The price of everything has run high.
Ups and downs (উত্থান পতন): There are ups and downs in a man’s life.