It's dangerous to fall off the boat without wearing a life jacket.

This land has a wide road frontage to the south.

He decided to accompany on the trip.

I accompanied her to the party.

North Korea has launched another ballistic missile.

My favorite fairy tale is Cinderella.

The structure of the vocal tract is very important in forming human voices.

'Agreement' and 'synonym' sound similar, but their meanings are completely different.

He found the answer to the problem using logical derivation.

He derived the correct answer from a complex mathematical problem.