2 sentences

1. 这家工厂利用余热为周边小区供热。

   zhè jiā gōng​chǎng lì​yòng yú​rè wèi zhōu​biān xiǎo​qū gōng​rè.

   This factory uses waste heat to provide heating for the surrounding residential areas.

   Source: Dong Chinese Dictionary

2. 北方地区的冬季集中供热通常持续四个月。

   běi​fāng dì​qū de dōng​jì jí​zhōng gōng​rè tōng​cháng chí​xù sì gè yuè.

   Centralized heating in northern regions usually lasts for four months in winter.

   Source: Dong Chinese Dictionary