Orbital velocity : কক্ষ-ভরবেগ;
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Appropriate Prepositions
Addicted to(খারাপ কিছুতে আসক্ত): She is addicted to collecting stamps.
Convenient to(সুবিধাজনক): The work is convenient to your nature.
Die by (দূর্ঘটনা বা অপঘাতে মরা/কোন কিছু দ্বারা মারা যাওয়া): He died by a road accident.
Run after (পশ্চাদানুসরণ করা): Do not run after money.
Succeed in (সাফল্য লাভ করা): He succeeded in life.
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Idioms
Bad bargain (purchasing at a high price-বেশি দামে কেনা-n) You had a bad bargain of the watch I see.
Hard nut to crack (কঠিন সমস্যা): The problem of adult education is really hard nut to crack.
Nip in the bud (অঙ্কুরে বিনষ্ট হওয়া): All his hopes were nipped in the bud.
Of course (অবশ্যই): Of course, you know what that meant.
Out of date (সেকেলে): This fashion is out of date.