2 sentences

1. 氮气在极低温度下会变成液态。

   dàn​qì zài jí dī wēn​dù xià huì biàn​chéng yè​tài.

   Nitrogen turns into a liquid state at extremely low temperatures.

   Source: Dong Chinese Dictionary

2. 物质通常有固态、液态、气态和等离子态四种状态。

   wù​zhì tōng​cháng yǒu gù​tài, yè​tài, qì​tài hé děng​lí​zǐ tài sì zhǒng zhuàng​tài.

   Matter usually exists in four states: solid, liquid, gas, and plasma.

   Source: Dong Chinese Dictionary