美国天然气期货跌超3%，现报3.305美元/百万英热

Group 1 - The core point of the article is that U.S. natural gas futures have dropped over 3%, currently priced at $3.305 per million British thermal units [1] Group 2 - The decline in natural gas futures indicates a significant movement in the energy market, reflecting potential changes in supply and demand dynamics [1] - The reported price of $3.305 per million British thermal units serves as a benchmark for market participants to assess future trading strategies [1]