Correct

油页岩

/ yóuyèyán / 
Strokes

Definition

oil shale

Example

As a Noun

oil shale; kerogen shale

1
Yóuyèyán
油页岩
zīyuán
资源

oil shale resources

2
Yóuyèyánqún
油页岩群

oil shale group

3
Yóuyèyán
油页岩
huàxué
化学

oil shale chemistry

4
Kāicǎi
开采
yóuyèyán
油页岩

mine oil shale