击中可能用来限制期限吸取到期限比赛那搜寻表达用产生那答案组，举例来说，SEL击中ti。
HIT may be used to restrict terms extracted to terms that match the search expression used to create the answer set, e. g., SEL HIT TI.
数字版权管理技术可以使电子图书在达到一定期限或使用限制后失效。
Technology known as digital rights management can make e-books unreadable once they have reached a certain time or user limit.
管理员可通过两种方法配置此特性：根据未来特定日期与配置当天相隔的天数限制预订，或根据特定的日期限制预订。
There are two ways that an administrator can configure the feature: limit reservations by a particular number of days into the future, or limit reservations by a specific date.
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