Wave mechanics : তরঙ্গধর্মী বলবিজ্ঞান;
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Appropriate Prepositions
Apathy towards (অনাগ্রহ): The student has great apathy towards his studies.
Arrange for(ব্যবস্থা করা): We have arranged everything for our study tour.
Careless of(অসতর্ক): Do not be careless of your health.
Genius for (দক্ষতা): Nazrul had a genius for convincing girls.
Long for (আশা করা/কামনা করা): He longed for name and fame.
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Idioms
Fight shy (এড়িয়ে চলা): Why do you fight shy of your teacher?
Look into something (তদন্ত করা- investigate) - The manager looked into the matter.
Seventh heaven – (মহাখুশী) – I was in the seventh heaven when I heard the news of my BCS final result.
Tooth and nail (তীব্রভাবে): He fought tooth and nail for the sake of country.
To and fro (hither and thither, এদিক ওদিক)-The man is walking to and fro.