Cosmic rays : মহাজাগতিক রশ্মি;
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Appropriate Prepositions
Adjacent to(সংলগ্ন): The Post Office is adjacent to my house.
Admit to(ভর্তি করা): The boy was admitted to class Nine.
Averse to (বিমুখ): Rahim was averse of your various problems.
Dependent on (নির্ভরশীল): Sepm is dependent on his father.
Hard of (কানে খাটো বা কম শোনা): Ratan is a hard of hearing.
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Idioms
As a whole (মোটের উপর, সম্পূর্ন এক মনে করে-adv.) Look at life as a whole and you will see that it is meaningful.
Kith and kin (নিকট আত্মীয়): He has no relation with his kith and kin.
Make head or tail – (মাথামুন্ডু বুঝা) – I cannot make head or tail of what you say.
Part and parcel (অবিচ্ছেদ্য অংশ): Education is part and parcel to build a civilized nation.
Tooth and nail (strongly, প্রবলভাবে)-He fought tooth and nail against his enemy.