xiǎo cháng shì xiāo huà xì tǒng de zhòng yào zǔ chéng bù fēn fù zé xī shōu yíng yǎng wù zhì

小肠是消化系统的重要组成部分，负责吸收营养物质。

The small intestine is a key part of the digestive system, responsible for absorbing nutrients.