车辆驶离行车道，（快速）冲下了陡峭的路堤。

The vehicle left the carriageway and ___plunged ___down the steep embankment.

他毫不犹豫地（跳入）了冰冷的湖中。

He ___plunged ___into the icy lake without hesitation.

飞机（穿过）了厚厚的云层，造成了一些湍流。

The aircraft ___plunged ___through the thick cloud cover, causing some turbulence.