As an astronomer, he discovered a new star cluster.

The walrus is a large marine mammal that lives in the Arctic.

He didn't give in to anger, he kept his reason.

He is known as a person with power and influence in this town.

Asei is my elder brother.

Maybe because of lack of sleep, my head feels fuzzy.

He acted according to my instructions one by one.

He is carefully doing each and every task.

He solved each problem one by one carefully.

The problem of space debris could potentially have a significant impact on future space development.