He is good at keeping balance on a horse's saddle.

Based on the Air Pollution Control Law, factories must strengthen the management of exhaust gases.

West Nile fever is an infectious disease transmitted by mosquitoes.

We flew in the sky in a hot-air balloon.

Thermochemistry is a branch of chemistry that studies the interaction of heat and matter.

Due to the impact of African swine fever, the price of pork is rising.

In linear algebra, the upper triangular matrix plays a very important role.

The grammar of 'Jou-nidan' is an important part in learning Japanese.

My room is on the upper level.

This handover is our new project.