SCIENTISTS at Cornell University in the US are building an unusual printer. The printer actually prints edible (可食用的) food! You just put the raw food “inks” into the machine, load (载入) the recipe and press the button. The foods that can be printed out include chocolate, cookie dough (面团), cheese, and cake mixture (混合剂). The scientists hope one day the printer will be as commonplace as the microwave oven.