Mechanical advantage : যান্ত্রিক সুবিধা;
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Appropriate Prepositions
By heart (মুখস্থ): Kamal learnt to poem by heart.
Fit for (যোগ্য): Sabina is not yet fit for marriage.
Guess at (অনুমান করা): It is difficult to guess at the age of women.
Penalty for, with (দণ্ড, জরিমানা): She has paid the penalty for the misuse of power with two years in prison.
Yield to (নতি স্বীকার করা): I shall not yield to his temptation.
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Idioms
At all (in the least degree – মোটেও না) There is no water at all in the pond.
For good (চিরদিনের জন্য): He left the house for good.
Hue and cry (শোরগোল): The villagers raised a hue and cry to see the thief.
Silver tongue (মিষ্টভাষী)- He is a man of silver tongue.
Set something right (ঠিক করা)— He will set the machine right.