HSK 6
瞬间
shùnjiān名
in an instant; in a flash
烟花在空中开放的瞬间很美。
Yān huā zài kōng zhōng kāi fàng de shùn jiān hěn měi.
The instant the fireworks opened in the sky was beautiful.
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New in the HSK 3.0 word list at level 6.