Spectrograph : বর্ণালীলেখ; স্পেক্ত্রোগ্রাফ; বর্ণালি যন্ত্র;
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Appropriate Prepositions
Abound in(প্রাচুর্যপূর্ণ হওয়া): Fish abounds in the pond.
Attention to(মনোযোগ): He has no attention to his studies.
Attentive to(মনোযোগী): He is attentive to his business.
Compensate for(ক্ষতিপূরণ করা): I will compensate him for the loss.
Fail in (ব্যর্থ হওয়া): He failed in getting internet connection in his room.
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Idioms
Gift of the gab (বাকপটুতা): An advocate should have the gift of the gab.
Put the cart before the horse (to reverse the natural order of things-কোনো জিনিসের স্বাভাবিক ক্রমকে পাল্টে দেয়া) - The leader put the cart before the horse.
Salt of the earth (গুরুত্বপূর্ণ ব্যক্তিবর্গ) —The salt of the earth is remembered always.
To go to the dogs (গোল্লায় যাওয়া)- He has gone to the dogs by keeping evil company.
To and fro (hither and thither, এদিক ওদিক)-The man is walking to and fro.