For example, flat files should have a trailer record telling the total of records in the file and an aggregate of the key fields.
例如，普通文件应该有一条尾记录，说明文件中的总记录数，以及关键字段的合计。
The films trailer was released online in May, only three days after shooting was completed. It has been viewed 4.7 million times, creating a new record among Chinese movies.
该电影于5月杀青后的第三天，就在网上发布了预告片，其观看次数达470万次，创造了国产电影的新纪录。
The films trailer was released online in May, only three days after shooting was completed. It has been viewed 4.7 million times, creating a new record among Chinese movies.
该电影于5月杀青后的第三天，就在网上发布了预告片，其观看次数达470万次，创造了国产电影的新纪录。
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