3 sentences

1. 古代攻城时，将士们会架起云梯。

   gǔ​dài gōng​chéng shí, jiàng​shì men huì jià​qǐ yún​tī.

   In ancient sieges, soldiers would set up scaling ladders.

   Source: Dong Chinese Dictionary

2. 山势陡峭，这一段石径云梯仿佛直插云霄。

   shān​shì dǒu​qiào, zhè yī duàn shí​jìng yún​tī fǎng​fú zhí​chā yún​xiāo.

   The mountain is steep, and this section of the stone path and ladder seems to pierce the sky.

   Source: Dong Chinese Dictionary

3. 消防员升起云梯，从高楼窗户救出了受困人员。

   xiāo​fáng​yuán shēng​qǐ yún​tī, cóng gāo​lóu chuāng​hu jiù​chū le shòu​kùn rén​yuán.

   The firefighters raised the aerial ladder and rescued the trapped people from the high-rise window.

   Source: Dong Chinese Dictionary