Dictionary › 油页岩
油页岩
yóu yè yán
What 油页岩 means
- oil shale
The characters in 油页岩
Looking a word up is not learning it. GraphChinese puts all of HSK 1–6 into one dependency graph, teaches each piece only once its prerequisites are solid, and schedules reviews to land just before you would forget.
Start learning — $49 lifetime