顷刻间

qǐng kè jiān mǐ kè yán sù de biǎo qíng hé ǎi qǐ lai liě zuǐ xiào le

顷刻间，米克严肃的表情和蔼起来，咧嘴笑了。

All at once, Mick's serious expression softened into a grin.