This computer is in a state of overload.

He just made a small mistake.

He made a small mistake during the exam.

Please be careful not to overcharge the battery.

Please be careful not to overcharge your smartphone's battery.

When the spring days pass, the cherry blossoms begin to fall.

This reaction occurs through a chemical process.

He is an excellent chemist who made many discoveries.

He is an expert in petrochemistry.

He is an expert in chemical analysis.