5 sentences

1. 待在室内，等待进一步指示。

   dāi zài shì​nèi, děng​dài jìn​yī​bù zhǐ​shì.

   Stay inside and await further instructions.

   Source: OpenSubtitles

2. 这个体育馆有一个很大的室内游泳池。

   zhè gè tǐ​yù​guǎn yǒu yī gè hěn dà de shì​nèi yóu​yǒng​chí.

   This gymnasium has a large indoor swimming pool.

   Source: Dong Chinese Dictionary

3. 这间办公室的窗户很小，室内气流不通。

   zhè jiān bàn​gōng​shì de chuāng​hu hěn xiǎo, shì​nèi qì​liú bù tōng.

   The windows in this office are very small, and there is no airflow inside.

   Source: Dong Chinese Dictionary

4. 这些厚实的金属管能很快地把热传到室内。

   zhè​xiē hòu​shi de jīn​shǔ guǎn néng hěn kuài de bǎ rè chuán dào shì​nèi.

   These thick metal pipes can quickly conduct heat into the room.

   Source: Dong Chinese Dictionary

5. 在没有室内厕所的年代，人们通常使用马子。

   zài méi​yǒu shì​nèi cè​suǒ de nián​dài, rén​men tōng​cháng shǐ​yòng mǎ​zi.

   In the days before indoor toilets, people usually used chamber pots.

   Source: Dong Chinese Dictionary