Astronautics : মহাকাশ যাত্রার বিদ্যা;
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astronautics  astronauts  See Words Also In
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Appropriate Prepositions
Annoyed at(ব্যক্তি ছাড়া অন্যকিছুর প্রতি বিরক্ত): They were annoyed at his rough behavior.
Apologize to (ক্ষমা প্রার্থনা করা, দুঃখসহ ত্রুটি স্বীকার করা): The student apologized to the Principal for adopting unfair means in the examination.
Attacked with(আক্রান্ত): He is attacked with …
Convict of(দোষী সাব্যস্ত হওয়া): The accused person was convicted of the murder.
Defend against (রক্ষা করা): We will defend our country against all enemies.
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Idioms
At the top of (শীর্ষে): The boy shouted at the top of his voice.
Out of date (সেকেলে): This fashion is out of date.
Slip of the tongue (বলায় সামান্য ভুল): This is a slip of the tongue; don’t pay much stress on it.
To the backbone (to the core, হাড়ে হাড়ে) —The boy is wicked to the backbone.
With a lavish hand (মুক্ত হস্তে)— Give away something with a lavish hand.