避孕套

例句：

1. 1. We need to usecondoms to prevent sexually transmitted diseases.
   我们需要使用避孕套来预防性传播疾病。
2. 2. The doctor advised us to use acondom during sex to protect ourselves fromHIV.
   医生建议我们在性行为中使用避孕套来保护自己免受HIV感染。
3. 3. Ibought a new condomfor my boyfriend, hoping itwould keep him safe.
   我给我的男朋友买了一个新的避孕套，希望它能保护他。