1.原文连结：
https://bloom.bg/2QTr5Gq
2.原文内容：
One Corner of U.S. Oil Market Has Already Seen Negative Prices
By Javier Blas and Sheela Tobben
2020年3月28日 上午12:25 [GMT+8] Updated on 2020年3月28日 下午7:00 [GMT+8]
In an obscure corner of the American physical oil market, crude prices have
turned negative