Free technical support is often available in the form of mailing list or newsgroup discussions; nevertheless some background research, knowledge or experience is often required.

免费的技术支持也可以以邮件列表或新闻讨论组的形式得到。然而，某种形式的背景研究、知识或经验常常是需要的。

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Relevant experience and educational background are important as well, but there is more required in finding the best person for the job.

招聘最合适的人担任某项工作，相关的经验和教育背景很重要，但是还有更多的要求。

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If an Oracle background process is aborted, often a restart of the instance is required.

如果异常终止一个Oracle后台进程，那么常常需要重启实例。

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The rules were developed after Schneiderman charged 10 gun sellers with failing to run required background checks before making sales to the undercover buyers at six shows around New York state.

WSJ: Most NY gun show operators agree to new rules

Twenty-three operators, representing more than 80 percent of the shows across the state, will abide by the "Model Gun Show Procedures" developed after undercover operations in 2011 showed buyers could obtain weapons without going through required background checks, Schneiderman said.

WSJ: Most NY gun show operators agree to new rules

The other measures would expand required federal background checks for firearms buyers, increase federal penalties for illegal gun trafficking and boost school safety money.

WSJ: Biden, speaking in NY, supports assault weapon ban