plunge ·phrase
Definition: to fall or move down very quickly and with force Level: C2
那架小型飞机突然失去高度，朝着森林猛冲下去。
The small plane suddenly lost altitude and ___plunged ___down towards the forest.
她毫不犹豫地跳入了冰冷的湖水中。
Without hesitation, she ___plunged ___into the icy cold water of the lake.
令人失望的财报发布后，该公司的股价暴跌。
The company's stock price ___plunged after the disappointing earnings report was released.