2 sentences

1. 这台机器以蒸汽为动力。

   zhè tái jī​qì yǐ zhēng​qì wéi dòng​lì.

   This machine is powered by steam.

   Source: Dong Chinese Dictionary

2. 水烧开后冒出了大量的蒸汽。

   shuǐ shāo​kāi hòu mào​chū le dà​liàng de zhēng​qì.

   A large amount of steam rose after the water came to a boil.

   Source: Dong Chinese Dictionary