In the world of mathematics, an abundant number refers to a number where the sum of its divisors is greater than the original number.

He gave a hastily prepared presentation.

She was frolicking in the park.

Kozue was listening to the bird's song at the top of the tree.

He is confused by too much information.

Yesterday, there was a big fire in the neighborhood.

I do housework every day.

A central vowel is a vowel that is pronounced in the central part of the tongue.

He is good at reading simplified Chinese characters.

He is an expert in pomology and is researching the cultivation methods of many fruits.