Aerology : আকাশতত্ত্ব; শূন্যবিজ্ঞান; বায়ুমণ্ডলবিজ্ঞান;
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Appropriate Prepositions
Authority on(বিশেষজ্ঞ পন্ডিত): Kamal was an authority on English literature.
Entrust to (কাউকে কোনো কিছু বিশ্বাস করে দেওয়া): He entrusted the thing to me.
Fail in (ব্যর্থ হওয়া): He failed in getting internet connection in his room.
Hinge on/upon (নির্ভর করা): The whole matter hinges upon this clue.
Sad at (দুঃখিত): All his colleagues were very sad at his transfer from this place.
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Idioms
At times (মাঝে মাঝে): He at times comes here.
Make both ends meet (আয় ব্যয় মেলানো): I cannot make both ends meet with my small income.
See to (বিবেচনা করা)— Can you see to it that everyone gets a copy of this memo?
Turn over a new leaf (begin a new phase of life, নবজীবন শুরু করা) —After his failure he turned over a new leaf.
Up and doing (উদ্যোগী): Be up and doing and then you will succeed in your life.