Orbital velocity : কক্ষ-ভরবেগ;
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Appropriate Prepositions
Abide with(সঙ্গে থাকা): If you would like to rest for a while, you can abide with me.
Careful of(যত্নশীল থাকা): Sadia is careful of her health.
Die for (আত্নত্যাগ করা): Our Chairman died for our country.
Loyal to (অনুগত): Every citizen must be loyal to the state.
Suffer from (অসুখে ভোগা, কষ্ট পাওয়া): He has been suffering from fever for last three days.
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Idioms
At every step (প্রতি পদে পদে): There are dangers at every step in our life and yet we want to live.
Breathe one’s last (decease, die- শেষ নিঃশেষ ত্যাগ করা, মরে যাওয়া) The man breathed his last in his native village.
See to (বিবেচনা করা)— Can you see to it that everyone gets a copy of this memo?
Sheet anchor (শেষ আশ্রয়; প্রধান অবলম্বন; আসল খুঁটি)— This small piece of land is his sheet anchor.
Under age (অপ্রাপ্ত বয়স্ক)- He could not cast his vote because he was under age.