Conductivity : পদার্থের তাপ ও তড়িৎ সঞ্চালন শক্তি;
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Appropriate Prepositions
Abstain from(বিরত থাকা): I am trying to abstain from sweets for my new diet.
Behave towards(ব্যবহার করা): The students behaved objectionably towards the Head teacher.
Bridge over (সেতু): The only entrance to Allahabad in that direction was by a bridge over the Jumna.
Detrimental to (অপকারী): Smoking is detrimental to health.
Take after (সদৃশ হওয়া, একই রকম হওয়া): The boy takes after his brother.
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Idioms
At one’s elbow (near at hand — হাতের কাছে – adv.) His private secretary is always at his elbow.
Kith and kin (নিকট আত্মীয়): He has no relation with his kith and kin.
Now and then (মাঝে মাঝে): He comes here now and then.
Pack up a quarrel (ঝগড়া মিটানো)— He packed up their quarrel.
Tide over (বিপদ অতিক্রম করা-overcome ): The manager tided over the situation.