2 sentences

1. 丙烷常用作烧烤炉的燃料。

   bǐng​wán cháng​yòng zuò shāo​kǎo​lú de rán​liào.

   Propane is commonly used as fuel for barbecue grills.

   Source: Dong Chinese Dictionary

2. 这种新型传感器非常灵敏，能检测到空气中极其微量的甲烷。

   zhè zhǒng xīn​xíng chuán​gǎn​qì fēi​cháng líng​mǐn, néng jiǎn​cè dào kōng​qì zhōng jí​qí wēi​liàng de jiǎ​wán.

   This new sensor is highly sensitive and can detect trace amounts of methane in the air.

   Source: Dong Chinese Dictionary