A cog in the machine : বিরাট ব্যবস্থা বা পরিকল্পনার এক নগণ্য অংশ;
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Appropriate Prepositions
Careless of(অসতর্ক): Do not be careless of your health.
Conform to (নিয়মনীতি অনুসরণ করা): The employees have to conform to a strict dress code.
Hostile to (বিরোধী বা বিরূপ ভাবাপন্ন): Nobody is hostile to you.
Road to (উপায়/ রাস্তা): There is no easy road to learning.
Sick of (ক্লান্ত): He is sick of this idle life.
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Idioms
Bear in mind (মনে রাখা): Always bear in mind that you are a daughter of a reputed person.
Gift of the gab (বাকপটুতা): An advocate should have the gift of the gab.
In cold blood (ঠান্ডা মাথায়): They committed this murder in cold blood.
In a nutshell (সংক্ষেপে): Tell the whole story in a nutshell.
Make head or tail – (মাথামুন্ডু বুঝা) – I cannot make head or tail of what you say.