His art style is unique, it's neither fish nor fowl.

In female anatomy, the labia majora is a part of the external genitalia.

He is studying the penile bone of ancient animals.

The 大陰脣 is a part of the female reproductive system.

She underwent an episiotomy for childbirth.

He always buys cheap things, so in the end, it becomes 'penny wise and pound foolish'.

Acidic oxides react with water to produce acids.

Aluminum is an amphoteric oxide, it reacts with both acids and bases.

Peroxides play an important role in chemical reactions.

I will participate in an obstacle race this weekend.