Mechanical advantage : যান্ত্রিক সুবিধা;
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Appropriate Prepositions
Angry with(কারো সাথে ক্রুদ্ধ হওয়া): The teacher was very angry with the students.
Annoyed for(কোনো কারনে বিরক্ত হওয়া): The officer was annoyed with the clerk for being late.
Bar to(বাধা): Poverty is not a bar to happiness.
Congratulate on(অভিনন্দন জানানো): They congratulated me on my brilliant success.
Rebel against (বিদ্রোহ করা): The soldiers rebelled against the king.
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Idioms
After all - (সব কথার পরেও): I rang and told her I couldn't come after all.
Bring to book (reproach-Start- ভর্ৎসনা করা) The father brought his son to book for his failure in the exam.
Salt of the earth (গুরুত্বপূর্ণ ব্যক্তিবর্গ) —The salt of the earth is remembered always.
To the contrary (against what some one had said, পক্ষান্তরে) —He said nothing to the contrary.
Ups and downs (উত্থান পতন): There are ups and downs in a man’s life.