Ultraviolet rays : অতিবেগুনী রশ্মি;
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Appropriate Prepositions
Answerable to (কারো কাছে জবাবদিহিতা করা): He is not answerable to anybody for his mistake.
Convenient to(সুবিধাজনক): The work is convenient to your nature.
Effect of (প্রভাব): The effect of corruption is very harmful for our society.
Look for (খোঁজা): I was looking for the lost phone.
Object to (প্রতিবাদ করা): Many people objected to the remarks of the leader.
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Idioms
At a standstill (নিশ্চল, অচলাবস্থায়-adj.) The discussion is now at a standstill.
Crying need (জরুরী): Mass education is a crying need for India.
Fair play (প্রতারণা বিহীন নীতি বা কাজ): I believe in the practice of fair play in my business.
Make hay while sun shines (ঝোপ বুঝে কোপ মারা) You should try to make hay while sun shines.
Three score (ষাট): He is happy as his brother got three score.