Spectrogram : বর্ণালির আলোকক চিত্র বা রেখা চিত্র;
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Appropriate Prepositions
Angry with(কারো সাথে ক্রুদ্ধ হওয়া): The teacher was very angry with the students.
Apply for(কারো কাছে আবেদন করা): Sumi applied to the Principal for free studentship.
At lunch (দুপুরের খাবারে): They were talking so much at lunch that their food went cold.
Descend on (আক্রমণ করা): Armed thieves descended on the helpless girl.
Make from (কোনো উপকরণ দ্বারা সরাসরি তৈরী নয় বোঝাতে): Paper is made from bamboo.
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Idioms
At home (comfortable— আরাম) He feels at home in Dhaka now.
Bad bargain (purchasing at a high price-বেশি দামে কেনা-n) You had a bad bargain of the watch I see.
In a fix (মুশকিলে পতিত হওয়া): The man is in a fix with his new hairstyle.
In full swing (পুরোদমে): The school is in full swing after the vacation.
In cold blood (ঠান্ডা মাথায়): They committed this murder in cold blood.