Organic chemistry : অঙ্গারক রসায়ন; জৈব-রসায়ন; জৈব রসায়ন;
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Appropriate Prepositions
Appropriate to(যোগ্য): His answer is appropriate to the question.
Arrange for(ব্যবস্থা করা): We have arranged everything for our study tour.
Avail (oneself) of(সুযোগের স্বব্যবহার করা): I shall avail myself of the first trip to London tomorrow.
Catch at(ধরা): A drowning man catches at a straw.
Cause for (চিন্তিত হওয়ার কারণ): He has never given me any cause for concern.
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Idioms
From cradle to grave (দোলনা থেকে কবর পর্যন্ত): Everyone has to learn from cradle to grave.
Man of straw (অপদার্থ): We do not care for a man of straw like you.
Null and void (বাতিল): The deed has been null and void now.
To the backbone (to the core, হাড়ে হাড়ে) —The boy is wicked to the backbone.
Widow’s mite (দরিদ্রের ক্ষুদ্র দান): A windows mite is no less important than a large contribution of a rich man.