Vacuum pump : নির্বাত অবস্থা পাম্প; ভ্যাকুয়াম পাম্প;
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Appropriate Prepositions
Appropriate to(যোগ্য): His answer is appropriate to the question.
Complain about (কোনো বিষয়ে নালিশ করা): They complained about the mismanagement of the programme.
Composed of(তৈরী): This medicine is composed of vitamins and minerals.
Convert to(দীক্ষিত): Tom is converted to another religion.
Send for (ডেকে পাঠানো): Send for a doctor immediately.
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Idioms
End in smoke (ব্যর্থ হওয়া): All his plans ended in smoke.
Foul play (অসদাচারণ করা): We feared that he had met with foul play.
Hold water (ধোপে টেকা): This policy will not hold water in this situation.
Moot point (অমীমাংসিত বিষয়): Dowry system is still a moot point in Bangladesh.
Take to one's heels (to run away, পালানো)- They took to their heels when they saw the policeman approaching.