今天我们要学的词是volatile。 Volatile, 不稳定的，动荡的。 "Wall Street ended a volatile week of trading," 华尔街股票交易结束了动荡的一周。 "With Europe's debt crisis and America's debt rating downgraded, global stock markets traded in volatile sessions," 人们担忧欧洲债务危机和美国评级下降，全球股票市场交易动荡。 "As the U.S. stock market continued its volatile ride, technology giant Apple has become the most valuable company in the world," 美国股市大幅动荡的同时，科技巨头苹果公司成为全世界市值最高的公司。好的，今天我们学习的词是volatile...