That is my personal issue.

We are going on a trip together.

I lost my precious belongings.

Forest fires cause great damage to the natural environment.

Last night, the town was hit by a conflagration.

The fire alarm went off, so we immediately evacuated the building.

He is an expert in embryology, studying the developmental processes of many kinds of organisms.

Please clean up your room right now.

The process of embryogenesis is very complex, with continuous cell division and differentiation.

Toshin came up with a sagacious way to solve the problem.