因为它们有赖于常见分组——如护照编号，出生地和出生日期——这往往是些高度结构化的序列，极易获取。

Because they depend on familiar groupings—such as passport numbers, places of birth and birth dates—they tend to be highly structured sequences that are quite easy to guess.

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这个证明包括了整形者护照的编号、在韩国停留的时间、医院的名称和地址以及医院的印章。

These certificates include the patient's passport number, the duration of stay, the name and location of the hospital and the hospital's official seal.

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如不能按时前往，可使用护照号或预约编号提前一天取消申请。

If you cannot handle the business on time, please cancel the reservation by your passport No. or serial No. in advance one day at least.

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