The noun 石油 (shíyóu) means "petroleum" or "oil" and refers to crude oil or fossil fuel. It is commonly used in discussions about energy, industry, and the environment. For example, 石油和天然气 means "oil and natural gas."
这个国家的经济主要依赖石油出口。
Zhège guójiā de jīngjì zhǔyào yīlài shíyóu chūkǒu.
This country's economy mainly relies on oil exports.
石油价格最近涨了不少。
Shíyóu jiàgé zuìjìn zhǎng le bù shǎo.
Oil prices have risen quite a bit recently.
人们正在寻找可以替代石油的新能源。
Rénmen zhèngzài xúnzhǎo kěyǐ tìdài shíyóu de xīn néngyuán.
People are looking for new energy sources that can replace oil.