Canada is one of the coldest countries in the world. (Comparative) = Canada is colder than most other countries in the world. 

Can their glory ever fade?   = Their glory can never fade.

By whom will you be helped?   = Who will help you?

By means of (উপায়ে/গুণে) You can earn money by means of hard work.

By means of (উপায়ে/গুণে) You can earn money by means of hard work.

By dint of = বদৌলতে

By and large= নিকটে তথা প্রচুরের/ সীমার নিকটবর্তী = statement is mostly but not completely true.

কিন্তু ছাত্ররা কঠোর পরিশ্রম করতে চায় না যা ভাল ফলাফলের জন্য আবশ্যক।

Buffalo = Buffalos

Brevity is the soul of wit.

Bread and butter (জীবিকা) At present, Govt. Job is mine bread and butter.

Books are a great source of happiness.

Bolt from the blue (বিনা মেঘে বজ্রপাত) This news was bolt from the blue for Naeem sir

Boar- Sow

Blue blood (আভিজাত্য) Don't boast of your blue blood.