锻炼可以增强身体的免疫力。

Duànliàn kěyǐ zēngqiáng shēntǐ de miǎnlì.

Exercise can enhance the body's immunity.

这种疫苗可以提高免疫力，预防疾病。

Zhè zhǒng yìmiáo kěyǐ tígāo miǎnlì lì, yùfáng jíbìng.

This vaccine can boost immunity and prevent diseases.

充足的睡眠有助于维持免疫系统健康。

Chōngzú de shuìmián yǒuzhù yú wéichí miǎnyì xìtǒng jiànkāng.

Adequate sleep helps maintain a healthy immune system.