Crystallography : কেলাসবিদ্যা; স্ফটিকবিজ্ঞান;
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Appropriate Prepositions
Appointment with (সাক্ষাতের সময়): He has an appointment with the minister at 10:00 am.
Count for(গণ্য বা বিবেচিত হওয়া): There can be no lasting peace without true democracy in which the people play a part and count for something.
Dull at (অপ্টু/কাঁচা): He is dull at mathematics.
Stare at (চাওয়া বা তাকানো): He stares at me.
Succeed in (সাফল্য লাভ করা): He succeeded in life.
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Idioms
All at once - (হঠাৎ): I feel terribly sleepy all at once.
As ill-luck would have it (unfortunately- দুর্ভাগ্যবশত) A child was born to them but, as ill-luck would have it, it died when it was eight days old.
Pave the way (সুপ্রসন্ন করা) – I am sure I can pave the way for your success.
White color job – (উচ্চ শ্রেনীর চাকরি, যেখানে শারীরিক কাজ নেই বললেই চলে- a job without manual labour) - He wants a white color job.
Wild goose chase (useless pursuit, পন্ডশ্রম) —Do not waste time in wild goose chase.