A cog in the machine : বিরাট ব্যবস্থা বা পরিকল্পনার এক নগণ্য অংশ;
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Appropriate Prepositions
Complain about (কোনো বিষয়ে নালিশ করা): They complained about the mismanagement of the programme.
Concerned with(জড়িত): She was concerned with such things.
Entrust to (কাউকে কোনো কিছু বিশ্বাস করে দেওয়া): He entrusted the thing to me.
Feed on (খেয়ে বাঁচা): The cow feeds on grass.
Solution to (সমাধান): None can solution to every problem.
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Idioms
At death’s door (at the point of death- মৃত্যুর দ্বারে) The patient is now at death’s door.
At every step (প্রতি পদে পদে): There are dangers at every step in our life and yet we want to live.
Fair play (প্রতারণা বিহীন নীতি বা কাজ): I believe in the practice of fair play in my business.
Kith and kin (নিকট আত্মীয়): He has no relation with his kith and kin.
To the utmost (যথাসাধ্য) - I tried to the utmost of my ability to have a job.