美国天然气跌3%，最新报3.339美元/百万英热

Group 1 - The core point of the article is that U.S. natural gas prices have decreased by 3%, with the latest price reported at $3.339 per million British thermal units [1] Group 2 - The decline in natural gas prices indicates potential market volatility and shifts in supply-demand dynamics [1] - The current price level may impact the profitability of companies involved in natural gas production and distribution [1] - Investors should monitor these price changes as they can influence broader energy market trends [1]