2 sentences for 保温 (bǎo​wēn)

1. 这瓶热水可以保温一整天。

   zhè píng rè​shuǐ kě​yǐ bǎo​wēn yī zhěng tiān.

   This bottle of hot water can stay warm all day long.

   Source: Dong Chinese Dictionary

2. 这种新型建筑材料的保温性能非常出色。

   zhè zhǒng xīn​xíng jiàn​zhù cái​liào de bǎo​wēn xìng​néng fēi​cháng chū​sè.

   The thermal insulation performance of this new building material is excellent.

   Source: Dong Chinese Dictionary