Tian
(
天
)
Tian
(
天
)
App Store
Google Play
Vocabulary
HSK 3
Day 5
石油
New
石油
石油
sh
í
y
ó
u
petroleum
noun
Again
1
Hard
2
Good
3
Easy
4
Previous word
Space flip · 1–4 grade · ← → move
Next word