Heterogeneity in societies will be the rule in the 21st century, and failure to recognize and plan for such diversity can lead to seriouscrime problems.
社会的多样性将成为21世纪的规则，如果未能认识到这种多样性并为之做准备，可能会造成严重的犯罪问题。
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Some legislators advocate mandating a sentence of life in prison for anyone who, having twice served sentences for serious crimes, is subsequently convicted of a third seriouscrime.