请把下面的汉语翻译成一句英文：
中国表示已向日本提出正式交涉。在此之前，日本名古屋市长再次否认第二次世界大战前日本军队于1937年屠杀了成千上万名中国平民，尽管有详实的记录记载这次屠杀。
参考答案：
China says it has lodged an official complaint with Tokyo, after the mayor of a Japanese city again denied the well-documented pre-World War Two massacre of several hundred thousand Chinese civilians by Japanese troops in 1937.
