变质:spoil/go bad; 食品变质:food spoilage; 易变质的:perishable; 不新鲜的:stale; 发霉的:moldy; 腐臭的:rotten/rancid; 过期的:expired; 保质期:shelf life/expiration date; 下架:remove off shelves; 处理:dispose of; 召回:recall;