wǒ / de / bāo / dì / bǐ / wǒ / xiǎo / wǔ / suì / wǒ / men / gǎn / qíng / hěn / hǎo

我的胞弟比我小五岁，我们感情很好。

My younger full brother is five years younger than me, and we have a very close relationship.