Annam is the old name of Vietnam.

I went to see the beautiful scenery of Donan.

The Southern Ocean is the coldest sea area on Earth.

I am planning to go to Jinan next week.

He is good at speaking Spanish.

He likes to learn new words.

He can speak Japanese fluently.

He is studying late into the night to learn a new computer language.

He is an amazing polyglot who can speak five languages fluently.

Natural language understanding is an important field of artificial intelligence.