广播电视英语短句 第 306 课：本周股票-1

Stock prices took a roller-coaster ride this week -- down one day, up the next. 本周股票价格象过山车：今天下跌，明天上涨。

Experts say the situation is likely to continue until investors feel more sure about signs of economic recovery. 专家指出，这一情形可能会持续，直至投资人对经济恢复的迹象更放心（为止）。

Some investors worry that Americans are not doing enough to lift the world's largest economy out of recession. 一些投资人担心，美国人所做的不足以使世界最大经济体（美国）摆脱衰退。

This is back-to-school season. But the National Retail Federation says school-related sales are down from last year. 目前是返校时节，但是 NRF （全美零售联合会）说，学校相关销售低于去年。

Consumer spending is seventy percent of the economic activity in the United States. 消费占美国经济的 70% 。