plunge

投入；跳进英释nnPlunge is also a noun

突然地下降；投入；陷入；跳进英释vvto move, fall, or be thrown suddenly forwards or downwards

1 plunge into,投入；跳入；突然或仓促地开始某事

2 take the plunge,冒险尝试；采取决定性步骤

3 plunge pool,n. 瀑布下的水潭

1 ...a plunge into cold water..…向着冰冷的水中的纵身一跳。