n. a steep and rapid fallv. dash violently or with great speed or impetuosityv. begin with vigorv. cause to be immersed
n. 钻进, 跳进, 跳水, 跳水池, 猛跌, 落下, 投入, 开始从事, 盲目投资vi. 投入, 投身于, 跳进, 陷入, 下降vt. 使投入, 使插入, 使陷入, 使遭受