Spectrograph : বর্ণালীলেখ; স্পেক্ত্রোগ্রাফ; বর্ণালি যন্ত্র;
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Appropriate Prepositions
Attacked by(আক্রান্ত ব্যক্তিবাচক): He has been attacked by a gang of robbers.
Concerned for (উদ্বিগ্ন): The parents are concerned for their growing children.
Greed for (লোভ): He has an indomitable greed for wealth.
Indulge in (প্রশ্রয় দেওয়া): You should not indulge in idleness.
Quick at (চটপটে): A cashier must be quick at figures.
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Idioms
At ease (in peace or pleasure – শান্তিতে বা আরামে) A man who has enemies can not live at ease.
Base born (নীচ বংশজাত, খারাপ জাত—adj.) He is a base born person; I cannot go along well with him.
In a fix (মুশকিলে পতিত হওয়া): The man is in a fix with his new hairstyle.
In one’s teens (তের থেকে উনিশ বছর বয়সের মাঝে): She is yet in her teens.
Three score (ষাট): He is happy as his brother got three score.