nosedive
noun [ C usually singular ] uk/ˈnəʊz.daɪv/ us/ˈnoʊz.daɪv/
俯冲
a fast and sudden fall to the ground with the front pointing down
The plane roared overhead and went into a nosedive. 飞机在头顶发出轰鸣，然后向下俯冲。
（价格等的）猛跌，骤降
a sudden fast fall in prices, value, etc.
There was alarm in the markets when the dollar took a nosedive. 美元暴跌时，各种市场一片恐慌。
nosedive
verb [ I ] uk/ˈnəʊz.daɪv/ us/ˈnoʊz.daɪv/
俯冲
to suddenly fall to the ground with the front pointing down
Spectators in the crowd watched in horror as the plane nosedived. 观众惊恐地看着飞机俯冲下来。
（价格等的）猛跌，骤降
to suddenly fall in value, quickly and by a large amount
House prices nosedived without warning. 事先没有任何预警房价突然暴跌。