今天我们要学的词是nosedive. Nosedive作为动词，是大跌，暴跌的意思。
New CDC research shows that birth rates for teens in the United States continued to nosedive in 2017, dropping 7 percent from the year before. 美国疾病控制与预防中心的最新研究数字显示，2017年美国十几岁年龄段的生育率继续大跌，比一年前下降了7%。
Western European smartphone shipments nosedived in the first quarter of 2018, according to a market research company. 一家市场调研公司表示，西欧智能手机的货运量2018年第一季度大幅度下跌。
好的，我们今天学习的词是 nosedive, nosedive, nosedive ...
