独家报道：美国正在考虑设定多晶硅的价格底线以及征收关税，以对抗中国在太阳能和芯片领域的影响

By Nichola Groom Aug 4 (Reuters) - The Trump administration is preparing to set a price floor and impose tariffs on polysilicon and related products, according to four people familiar with the plan, putting a material critical to solar panels and semiconductors at the center of U.S. efforts to compete with China on artificial intelligence and energy. The decision, expected to come later this