This is handy, but can severely impact system performance.

这是得心应手，但可以严重影响系统的性能。

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Adverse trends might impact system design activity with corresponding risks to technical, cost, and schedule baselines, as well as to customer satisfaction.

有害趋势可能影响系统设计行为，并对技术、成本，以及进度基线，和客户满意度都有一定的风险。

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Enabling this trace facility will negatively impact system performance, so you should not enable it unless recommended by IBM Software Support and development teams.

启用此跟踪工具将对系统性能造成负面影响，因此除非ibm软件支持和开发团队推荐，否则不应启用它。

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"In some of the governorates, have not a single member working, without any source of income, which is in turn having a huge impact on their ability to afford rented accommodation and their ability to buy food in a country where the public distribution system is failing quite badly,".

VOA: standard.2009.09.20

One example from Uganda suggests that PETS results can make an impact on system improvement provided there is strong government commitment.

UNESCO: Accountability

Ridell started experimenting with them back in 2006 or so (See this article from MIT Technology Review) and a New Hampshire company called Simbex sells something called the Head Impact Telemetry system (HIT system get it, get it?) which would allow the NFL to start in right away.

FORBES: A Better Solution to the NFL's Concussion Problem

They also are a possible cause of melanoma, the deadliest of skin cancers, and may impact the immune system.

WSJ: European Sunscreen Roadblock on U.S. Beaches