oil shale

ریشه

The word 'oil' refers to petroleum, and 'shale' comes from the Old English word 'scealu,' meaning shell or husk.

مثال

• Oil shale is an unconventional source of oil.
• The extraction of oil from oil shale requires specialized processes.
• Oil shale deposits are found in various parts of the world.

ترکیب‌های رایج

Extract oil from oil shale Process oil shale Exploit oil shale Deposit of oil shale