求翻译：　2011年3月，上海一些超市销售同一个公司生产的三种馒头，这些看起来白白香软的小麦馒头、淡黄诱人的玉米面馒头，却是靠着色剂染色生产出来。是什么意思？

March 2011, Shanghai, some supermarkets sell a company with three buns, these appear to be in vain savory bread wheat, yellow cornmeal bread attractive, but it is relying on the color produced by dyeing agent.

March 2011, Shanghai some supermarket sales with a company's production of 3 kinds of white bread, and these look blankly Hong soft wheat bread, wheat bread, but tempting tortillas were also being provided by colorants coloring into production.

　In March, 2011, the Shanghai some supermarket sale identical company produces three kind of steamed buns, these look like in vain the fragrant soft wheat steamed bun, the light yellow attractive corn flour steamed bun, is actually closes right up against the stain dyeing to produce.

　In March 2011, some supermarkets sell the same company produces three steamed buns, these look white fragrant soft wheat bread, light yellow attractive corn bread, it was produced by pigment dyeing.

　In March 2011, some supermarkets sell the same company produces three steamed buns, these look white fragrant soft wheat bread, light yellow attractive corn bread, it was produced by pigment dyeing.