His attitude was threatening, and I became scared.

Fundamental knowledge of mathematics is necessary to solve advanced problems.

This summer was record-breaking heat.

His way of thinking is very philosophical.

His behavior was very comedic.

The Tōhoku earthquake off the Pacific coast, which occurred on March 11, 2011, was the largest earthquake in Japanese history.

In arid regions, there is little rain, making it difficult for plants to grow.

In the ecosystem of this area, 'inquilinism', where certain species parasitize the nests of other species, is common.

He was surprised when he saw that huge rock.

Darn, it's raining again.