adj.跳進的；突然往下的
動詞plunge的現(xiàn)在分詞形式.
Water isn't the only thing plunging to the bottom of the gorge. 因此，落入谷底的并不僅僅是水流。
Right now, the biggest problem facing our economy is plunging business investment. 當(dāng)前我們經(jīng)濟面臨的最大問題是商業(yè)投資的大幅下降。
