Informal To provide with information that is essential or newly acquired:【非正式用语】 提供消息：提供必需的或最近获得的消息：I wasn't there—would you fill me in?我不在那里——你能告诉我那的消息吗
To act as a substitute; stand in:暂代：担任替补；临时替补：an understudy who filled in at the last minute.在最后一分钟才临时替补的演员