常见例句Keywords esophageal cancer;total N nitroso compounds;N nitrosamino acids;correlation; 食管癌;总亚硝基化合物;亚硝基氨基酸;相关性;nitrosamino","ONNH-"," 亚硝胺基"Nitrosamino 亚硝氨基nitrosamino group 亚硝胺基 返回 nitrosamino-