In order to survive in this ever-changing world, it is necessary to constantly continue learning new knowledge.

You can see drift ice in the Sea of Okhotsk in winter.

He was standing on the seashore, staring at the distant horizon.

He gained sailing experience in the Arabian Sea.

When summer vacation comes, I go to the sea every day wearing swim trunks.

She always says 'the lady doth protest too much,' seeming to deny his actions, but in reality, she loves him very much.

The olive ridley sea turtle is one of the smallest sea turtles in the world.

The flatback sea turtle is a species endemic to Australia and is on the brink of extinction.

He was promoted to the rank of lieutenant junior grade last year.

He was promoted to Rear Admiral.