He is a very on-the-ball person, always aware of the situation.

His alertness keeps him safe even in dangerous situations.

I decided to start a new business taking advantage of this favorable opportunity.

There is always hot coffee in my thermos.

Areca catechu, or betel nut, is a plant commonly seen in tropical regions, and its fruit is said to have a stimulating effect when chewed.

In Taiwan, there is a habit of chewing betel nuts.

He likes to chew betel nuts.

Bingo was an ancient place name in Japan, located in the eastern part of present-day Hiroshima Prefecture.

I wrote a letter on the letter paper.

He resisted the police by throwing a Molotov cocktail.