The physical characteristics that make a human being, animal, or plant, male or female.

性。

One of the two divisions into which the higher forms of life are grouped, as being distinctly male or female.

女性；男性。

The physiological, functional, and psychological differences that distinguish the male and the female.

性别。

The sexual urge or instinct as manifested in behavior.

性欲。

Sexual intercourse.

性交。

The external genital organs of a human being.

(人类的)性器官。

To identify the sex of.

辩别...的性别。