Spherical aberration : গোলাপেরণ;
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Appropriate Prepositions
Apology for (কোনো কারনে ক্ষমা চাওয়া): Sajib should ask apology to her of his mistake.
Ascend from (উপরে ওঠা): Rahim watched the mist ascending from the valley.
Careless of(অসতর্ক): Do not be careless of your health.
Concerned with(জড়িত): She was concerned with such things.
Subject to (সাপেক্ষে): The man was appointed subject to the approval of the chairman.
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Idioms
At a discount (অনাদৃত) Female education is no longer at a discount now.
Out of sorts (সামান্য অসুস্থ): The baby is out of sorts after playing.
Pass sth/sb off as sth/sb (মিথ্যা পরিচয় দেয়া; Pretend – ভান করা): They were trying to pass off these shirts as genuine Armani.
Set something right (ঠিক করা)— He will set the machine right.
With a lavish hand (মুক্ত হস্তে)— Give away something with a lavish hand.