1. Medical research often studies the impact of sex activity on physical wellness.
医学研究经常研究性活动对身体健康的影响。
2. In biology, sex activity is crucial for the continuation of species.
在生物学中，性活动对于物种的延续至关重要。
3. Health experts emphasize the importance of understanding sex activity in a medical context.
健康专家强调在医学语境下理解性行为的重要性。

A: Does sex activity affect hormone levels?
A：性活动会影响激素水平吗？

B: Yes, it can influence various biological functions.
B：是的，它会影响多种生物功能。

1) 生物学的生殖过程

2) 社会学中的亲密行为

3) 医学中的性行为描述

1. 性行为；性活动

e.g. The study examines the relationship between age and sex activity.
该研究探讨了年龄与性活动之间的关系。

noun phrase

1. Acts involving sexual organs or behavior, often discussed in biological, medical, or sociological contexts.

Synonym: sexual behavior