Petro chemical : পেট্রলজাত রাসায়নিক পদার্থ;
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Appropriate Prepositions
Apply for(কারো কাছে আবেদন করা): Sumi applied to the Principal for free studentship.
Bare of(অনাবৃত, স্বল্প-সজ্জা): The trees of the forest are bare of leaves.
Devote to (উৎসর্গ করা/নিয়োজিত করা): Students should devote sufficient time to their studies.
Repent on (নির্ভরশীল): He is repent on his parents.
Rule over (শাসন করা): In the absence of the Parliament, the President rules over the country.
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Idioms
At liberty (free-মুক্ত-adj.) They are at liberty to go anywhere.
Bird’s eye view - (ভাসা ভাসা দৃশ্য, হালকাভাবে দর্শন): We took a bird’s eye view of the scenery.
Fair and square (সৎ): The learned persons should be fair and square.
Of course (অবশ্যই): Of course, you know what that meant.
Through and through (পুঙ্খানুপুঙ্খু রুপে)- He read the poem through and through.