Watt hour : একঘন্টা ধরে এক ওয়াট ক্ষমটা প্রয়োগ করলে যে পরিমাণ শক্তি ব্যয়িত হয়;
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Appropriate Prepositions
Appoint to(নিযুক্ত করা/হওয়া): Kibria has been appointed to the post of Headmaster.
Due to (কারণে): His absence is due to illness.
Eager for, about (একাগ্র): The students for this school are eager for knowledge. The teacher is eager about the success of his students.
Fit for (যোগ্য): Sabina is not yet fit for marriage.
Smile on/upon (অনুগ্রহ করা): Fortune smiles on/upon the brave.
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Idioms
Fair play (প্রতারণা বিহীন নীতি বা কাজ): I believe in the practice of fair play in my business.
In one’s teens (তের থেকে উনিশ বছর বয়সের মাঝে): She is yet in her teens.
On the contrary (বিপরীত পক্ষে): I do not hate him; on the contrary I love him.
To play on a fiddle (অনর্থক সময় নষ্ট করা - To waste time)-He played on a fiddle by nature.
Slip of the tongue (বলায় সামান্য ভুল): This is a slip of the tongue; don’t pay much stress on it.