Spectrograph : বর্ণালীলেখ; স্পেক্ত্রোগ্রাফ; বর্ণালি যন্ত্র;
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Appropriate Prepositions
Aptitude for(স্বাভাবিক দক্ষতা, যোগ্যতা): He has no aptitude for public service.
Fond of (প্রিয়/অনুরাগী): Children are fond of sweets.
Heir to (উত্তরাধিকার পাওয়া): He is an heir to a vast property.
Hunger for (আকাঙ্কা): The teacher has a great hunger for knowledge.
Loyal to (অনুগত): Every citizen must be loyal to the state.
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Idioms
Acid test (অগ্নি পরীক্ষা): You must succeed in the acid test of the time you live in.45
At times (মাঝে মাঝে): He at times comes here.
Run short (কমতি পড়া) —I ran short of money.
Set something right (ঠিক করা)— He will set the machine right.
Well off (স্বচ্ছল) - Jim and Della were not well off.