提示：点击例句中的单词，就可以看到词义解释

They need to stop playing all these std commercials .

他们别再放这些放性病广告了。

You can get an std any time you have unprotected sex .

在任何无防护措施的性行为中你都有可能感染性病。

That 's why you have to be vigilant about std prevention .

那就是为什么对于性病预防要保持警惕。

Researchers in australia surveyed 185 men and women , ages 16 to 25 , at the university of sydney on their sexual history and std knowledge .

研究人员在澳大利亚的悉尼大学调查了185名年龄在16到25岁的男女学生的性爱历史和性病知识。

If you 're not in an exclusive relationship , you can still protect yourself by learning about and consistently practicing std prevention , such as using condoms .

如果没有专一的性伴侣，你仍然能通过学习和不断练习性病预防的方法来保护自己，例如使用避孕套的方法。