Spectroscope : বর্ণালীবীক্ষণ; বর্ণালিবীক্ষণ যন্ত্র;
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Appropriate Prepositions
Arrive at(উপস্থিত হওয়া, পৌছানো): The train arrived at Dhaka station on time.
Ask for (কোনো কিছু চাওয়া): Do not ask him for any help because he doesn’t like to help anyone.
Capable of(সক্ষম): He is capable of doing it.
Famous for (বিখ্যাত): Smith is famous for his wisdom.
Repentance for (অনুতাপ): He has repentance for the past.
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Idioms
Backstairs influence (secret and illegal influence- গোপন এবং বে আইনী প্রভাব-n) He did not deseve the job, however, he got it by backstairs influence.
Out of temper (ক্রুদ্ধ): The teacher is out temper to see the overall results.
Round the clock (সমস্ত দিন): He is working round the clock.
Riding for a fall (বেপরোয়াভাবে কাজ করা- to act recklessly): He rides for a fall in the election.
Turn down (refuse, প্রত্যাখান করা) —He turned down my proposal.