3 sentences

1. 医生强调了预防性病的重要性。

   yī​shēng qiáng​diào le yù​fáng xìng​bìng de zhòng​yào​xìng.

   The doctor emphasized the importance of preventing STDs.

   Source: Dong Chinese Dictionary

2. 使用安全套可以降低感染性病的风险。

   shǐ​yòng ān​quán​tào kě​yǐ jiàng​dī gǎn​rǎn xìng​bìng de fēng​xiǎn.

   Using condoms can reduce the risk of contracting STDs.

   Source: Dong Chinese Dictionary

3. 正确使用避孕套可以降低感染性病的风险。

   zhèng​què shǐ​yòng bì​yùn​tào kě​yǐ jiàng​dī gǎn​rǎn xìng​bìng de fēng​xiǎn.

   Correct use of condoms can reduce the risk of contracting STIs.

   Source: Dong Chinese Dictionary