Heterogeneity in societies will be the rule in the 21st century, and failure to recognize and plan for such diversity can lead to serious crime 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。
Although Cron has serious problems on a system that is shut down regularly, it is still the tool of choice for jobs that run frequently, such as hourly checks for new E-mail on a remote mail server.
尽管对于经常关闭的系统来说，Cron会造成一些严重的问题，但是，对于经常运行的作业，比如远程邮件服务器上每小时进行一次的新邮件检查，Cron仍然是一个重要的工具。
"The introduction of such restrictions without warning creates serious problems for companies operating in China, " said the European Union Chamber of Commerce in Beijing.
“在没有预警的情况下出台这些限制，给在华经营的企业制造了严重问题”，在北京的欧盟商会（EuropeanUnion Chamberof Commerce）表示。
However, the oil based hydraulic systems present some serious problems, such as potential for fire.
然而，油基础的水力系统呈现一些严重的问题，像是火的潜能。
However, the oil based hydraulic systems present some serious problems, such as potential for fire.
然而，油基础的水力系统呈现一些严重的问题，像是火的潜能。
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