He always proactively suggests new ideas.

He likes to take a walk in the park at dusk.

My mother has been suffering from temporomandibular joint dysfunction for many years.

The bearded seal is a marine mammal often seen in the Arctic.

He is doing a special exercise to train his digastric muscle.

He solved the problem in a scientific way.

This reaction occurs through a chemical process.

He is good at tactical thinking.

He exercises every day and leads a healthy life.

Fundamental knowledge of mathematics is necessary to solve advanced problems.