Thus a negative strain produces a decrease in length.

因此，应变产生的负面镌汰长度。

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And the effects under the control laws of negative strain rate feedback and positive strain feedback are compared.

比较了应变率负反馈和应变正反馈控制律的控制效果。

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Uniaxial prestrain will obviously improve the forming limit on positive strain ratio zone, while it has little effect on negative strain ratio zone.

单拉预应变路径将显著提高正应变比区的成形极限，而对负应变比区的成形极限影响不大。

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While some of the samples have tested negative for the rare strain of enterohaemorrhagic E. coli (EHEC), the results of other tests are still pending and expected later on Wednesday.

BBC: E. coli: Germany says worst of illness is over

When it comes to emotional labor, mindfulness promotes accepting and recognizing negative emotions instead of repressing them, which puts less strain on our emotional resources and preserves vitality.

FORBES: Tired, Stressed Out, Need A break? Recognize It But Don't React

Federal Reserve Chairman Ben Bernanke warned of continued strain on the U.S. economy and noted the negative impact of elevated volatility and risk aversion in the financial market during testimony before a joint committee of Congress Tuesday.

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