Because they depend on familiar groupings—such as passport numbers, placesofbirth and birth dates—they tend to be highly structured sequences that are quite easy to guess.
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。
2
The boss's other requirements were to sort the list, increase prices by 20%, write prices to two decimal places, and replace dates ofbirth with ages.
老板的其他需求是对列表进行排序、将价格提高20%、将价格写成两位小数以及用年龄替换出生日期。
3
Germination is complicated with the bursting forth of a meteor and with the peck of a swallow cracking its egg, and it places on one level the birthof an earthworm and the advent of Socrates.