常见例句双语例句We had found the isomers of Sudan III and Sudan IV in foods at first, their structures were very similar to Sudan III or IV and the isomers were red matter, too.同时首次发现食品中添加有与苏丹III和IV结构极其近似的同分异构体存在，且其同分异构体也为红色物质。 返回 sudan iv