求翻译：　国际评级机构惠誉11日宣布，由于西班牙主权评级下降，且该国经济衰退可能延续至明年，故将西班牙最大两家银行西班牙国际银行和西班牙对外银行长期信用评级由A下调两档至BBB+级，评级展望为负面。是什么意思？

International rating agency Fitch announced on the 11th the Spanish sovereign ratings downgrades, and the country's economic downturn likely to continue into next year, it will be the largest two banks in Spain Spanish international banks and the Spanish Foreign long-term bank credit rating by a low

International rating agency Fitch, as announced on 11 Spanish sovereign ratings decline, and the country's economic slowdown next year may be carried over%