Standard deviation : ব্যত্যয় প্রমাপ;
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Appropriate Prepositions
Ascend from (উপরে ওঠা): Rahim watched the mist ascending from the valley.
Bark at(ঘেউ ঘেউ করা): The dog is barking at the strange woman.
Capable of(সক্ষম): He is capable of doing it.
Consistent with(সামঞ্জস্যপূর্ণ): Your action is not consistent with your word.
Shout at (চিৎকার করে ডাকা): Do not shout at your parents.
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Idioms
In a fix (মুশকিলে পতিত হওয়া): The man is in a fix with his new hairstyle.
Put the cart before the horse (to reverse the natural order of things-কোনো জিনিসের স্বাভাবিক ক্রমকে পাল্টে দেয়া) - The leader put the cart before the horse.
Speed money (ঘুষ; উৎকোচ): He hankers after speed money.
Weal and woe (সুখ-দুঃখ): Human life is full of weal and woe.
Weal and woe (joy and sorrow, সুখ দঃখ) —Human life is full of weal and woe.