Hydrography : পৃথিবীর জলভাগ সম্বন্ধে গবেষণা উহার মানচিত্রাঙ্কন গভীরতা নির্ণয় প্রভৃতি সংক্রান্ত বিজ্ঞান;
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Appropriate Prepositions
Adequate to(সমানুপাতিক): The salary, he gets, is not adequate to the volume of work he has to do.
Consent to(মত দেওয়া): My father did not consent to the proposal of my sister’s marriage.
Contrary to(বিপরীত, পরিপন্থী): Students should not act contrary to the rules of discipline.
Informed of (অবহিত): I was not informed of your misfortune.
Sorry for (দুঃখিত): He is sorry for his misdeeds.
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Idioms
At times (মাঝে মাঝে): He at times comes here.
At-fault (guilty-কিংকর্তব্যবিমূঢ়, অপরাধ, দোষ adj.) You are at fault.
Do yeoman’s service (বিশেষ উপকার করা): Freedom fighters have done yeoman’s service for country.
Take to heart (মর্মাহত হওয়া)- He really took it to heart when I asked him to reconsider.
Wild goose chase (useless pursuit, পন্ডশ্রম) —Do not waste time in wild goose chase.