std. by

std. by

美 　英

• 网络待机

例句

You can get an STD by having unprotected sex with a partner who's infected.

可以通过与感染者的无防护性行为而感染性病。

Comparative analysis on the differences in epidemic situation of STD by different epidemic situation report systems

不同疫情报告系统性病疫情差异对比分析

Studied on High- quality STD by Water Methods

水法制高纯杀虫单原粉新技术研究