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.
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
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 birth of an earthworm and the advent of Socrates.