The balance of trade, or net
exports is the difference between the monetary
value of exports and imports of output in an
economy over a certain period. It is the
relationship between a nation's imports and
exports. A positive balance is known as a trade
surplus if it consists of exporting more than is
imported: a negative balance is referred to as a
trade deficit or, informally, a trade gap.
ভাষা ও ভাষার উৎপত্তি
Plasma Physics (প্লাজমা পদার্থবিদ্যা)
Laser (লেজার)
Quantum materials (কোয়ান্টাম উপকরণ)
Particle physics (কণা পদার্থবিজ্ঞান)
Optics (অপটিক্স এবং ফোটোনিক্স)