sex

Please state your name, age, and sex on the official application form.

(Chinese) 请在正式申请表上注明您的姓名、年龄和性别。

It is difficult to determine the sex of a kitten when it is very young.

(Chinese) 当小猫很小时，很难确定它的性别。

Education programs often focus on safe sex to prevent the spread of diseases.

(Chinese) 教育计划通常侧重于安全性行为以防止疾病传播。

Biological researchers study the sex drive of animals during the mating season.

(Chinese) 生物研究人员研究动物在交配季节的性冲动。