Bathyscaphe : গভীর সমুদ্রতলে অনুসন্ধান চালাবার জন্য বিশেষভাবে নির্মিত মনুষ্যবাহী জলযান;
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Appropriate Prepositions
Conceal from(লুকানো) Do not conceal anything from me.
Damage to (ক্ষতি): The flood caused much damage to crops last year.
Dwell upon (আলোচনা করা): They dwell long upon the matter.
Rule over (শাসন করা): In the absence of the Parliament, the President rules over the country.
Subsist on (বেঁচে থাকা): The poor subsist mainly on rice and pulses.
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Idioms
At a standstill (নিশ্চল, অচলাবস্থায়-adj.) The discussion is now at a standstill.
Fall flat (ফলপ্রসূ না হওয়া): This business is going to fall flat.
Fair play (প্রতারণা বিহীন নীতি বা কাজ): I believe in the practice of fair play in my business.
Seventh heaven – (মহাখুশী) – I was in the seventh heaven when I heard the news of my BCS final result.
Safe and sound (নিরাপদে)— He reached home safe and sound.