The development of nuclear-powered ships must consider their impact on the environment.

The sudden bonus was indeed a godsend.

The police have started searching for the suspicious ship.

We toured the lake by tour boat.

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

He suffered from external bleeding due to an accident.

He has experience living in a foreign country.

That proposal is completely unthinkable.

We are searching for extraterrestrial life.

Please teach me how to calculate the circumcenter of this triangle.