他提供了一些建议来预防感冒。

Tā tígōngle yī xiē jiànyì lái yùfáng gǎnmào.

He provided some suggestions for preventing colds.

预防比治疗更重要。

Yùfáng bǐ zhìliáo gèng zhòngyào.

Prevention is more important than treatment.

预防艾滋病需要正确的知识。

Yùfáng àizībìng xūyào zhèngquè de zhīshì.

Preventing AIDS requires correct knowledge.