He is an expert in pomology and has contributed to the improvement of many fruit varieties.

This dress is made of georgette.

Her dress is made of georgette, and it's very beautiful.

This mineral is called anhydrite.

Maintaining oral hygiene is very important for overall health.

He is working at the pithead.

We steered the ship towards the harbor entrance.

He practices every day to improve his sailing skills.

We plan to sail on a yacht during the summer vacation.

Studying the history of the Imperial Examination is important for understanding the past of our country.