He crossed the border and fled to the neighboring country.

This software maintains backward compatibility.

He is an expert in ethology, and his research is highly regarded worldwide.

I used an optical microscope for an experiment at school.

I mainly use public transportation facilities for commuting.

Protein-degrading enzymes play a role in breaking down unnecessary proteins in the body.

Demography is an important tool for understanding various aspects of society.

This compound has a tetrahedral molecular geometry.

During winter, my energy bill significantly increases.

He had a throat problem, and it was found that his posterior cricoarytenoid muscle was not functioning properly.