The queen has returned to the castle.

He started running in the northwest direction.

This chemical is very volatile.

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

His recovery was truly miraculous.

He has fundamental knowledge of mathematics.

When I looked up at the night sky, I saw a beautiful asterism.

This plant is bisexual, with male and female flowers occurring on the same plant.

This compound has a high basicity.

His voice sounded very gentle.