Beginner Level Advanced Level
INTERMEDIATE LEVEL
Content
→ → →
OXF3000N 
bằng phẳng bẹt nhẵn dãy phòng căn phòng mặt phẳng 
flat
OXF3000N mặt mặt phẳng side
like: mặt phẳng → →
I need a flat surface to write on. ☊ flat ☊
the tail section of the plane ☊ section ☊
We'll need a flat surface to play the game on. ☊ surface ☊