| 1. | To avoid stds , condoms must be used in addition to any method you choose
为避免性传播疾病，必须使用安全套。 |
| 2. | Condoms made from sheep intestines do not protect agai t stds
由羊肠制成的避孕套却不能防止性传播疾病的传染。 |
| 3. | Condoms made from sheep intestines do not protect against stds
由羊肠制成的避孕套却不能防止性传播疾病的传染。 |
| 4. | Stds can be read by people who don ' t know they are infected
性传播疾病可以通过那些感染了这些疾病但本身并不知情的人传播。 |
| 5. | Stds can be spread by people who don ' t know they are infected
性传播疾病可以通过那些感染了这些疾病但本身并不知情的人传播。 |
| 6. | Experimental study progress of herbs in the treatment of primary carcinoma of liver
泌尿生殖道感染者主要性传播疾病病原体的检测 |
| 7. | Effect of health education and behavioral intervention of aids std among female attendants of roadside inn
性传播疾病健康教育与行为干预研究 |
| 8. | Some stds , such as hiv , can take up to 6 months before they can be detected in the blood
一些性传播疾病像hiv在血液存在6个月后才能被检查出来。 |
| 9. | Stds , which affect both men and women , are a worldwide public health concern
性传播疾病同时影响男性和女性的健康，已经成为了世界范围的健康问题。 |
| 10. | But syphilis , a * ually transmitted disease ( std ) , seems more of a chinese disease these days
但是梅毒，一种性传播疾病，现在看起来更象是一种中国人的病。 |
