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