He is an expert in computational linguistics and is involved in the development of artificial intelligence.

He mastered the technique of grafting grapevines.

She had a beautiful headdress on her head.

He couldn't hide his remorse for the failure.

He drew a circle.

I gathered the stalks of millet and used them as livestock feed.

His character affects all the people he is involved with.

The road caved in and was closed to traffic.

I am studying Korean language.

He is a famous film director.