zhè / zhǒng / méi / qiú / rán / shāo / de / hěn / màn / shì / hé / cháng / shí / jiān / qǔ / nuǎn

这种煤球燃烧得很慢，适合长时间取暖。

This type of charcoal briquette burns slowly and is suitable for long-term heating.