HSK 5
空中
kōngzhōng名形
in the sky; in the air
几只气球正在空中上升。
Jǐ zhī qì qiú zhèng zài kōng zhōng shàng shēng.
Several balloons are rising through the air.
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Other HSK words sharing a character
Also free:
New in the HSK 3.0 word list at level 5.