起提醒作用的东西
Reminder \Re*mind"er\ (-?r), n. One who, or that which, reminds; that which serves to awaken remembrance.
reminder n 1: a message that helps you remember something; "he ignored his wife's reminders" 2: an experience that causes you to remember something 3: someone who gives a warning so that a mistake can be avoided [syn: {admonisher}, {monitor}]