Ultraviolet rays : অতিবেগুনী রশ্মি;
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Appropriate Prepositions
Apathy towards (অনাগ্রহ): The student has great apathy towards his studies.
Careless of(অসতর্ক): Do not be careless of your health.
Fail in (ব্যর্থ হওয়া): He failed in getting internet connection in his room.
Indulge in (আসক্ত): You should not indulge in social media.
Repent of (অনুতাপ করা): I repented of my past.
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Idioms
Brown study (দিবাস্বপ্ন): The girl is absorbed in a brown study.
Cock and bull story (আষাঢ়ে গল্প): You must be ashamed of your cock and bull story.
On the whole (মোটের ওপর): On the whole, his conduct is good.
Tooth and nail (তীব্রভাবে): He fought tooth and nail for the sake of country.
Through thick and thin (through all difficulties, সমস্ত সমস্যার মধ্যে)-Ruma followed her husband through thick and thin.