Slope bioengineering has significant protective effect on ecology environment, yet vegetation has complex effect on the stability of slope, it plays both positive and negative roles.

植被护坡在改善生态环境方面的作用是显著的，但植被对坡体稳定性的影响却很复杂，积极与消极的作用共存。

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Heat stability test was negative.

热不稳定试验阴性。

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This paper analyses the influence of end constraints, side displacement, positive and negative symmetric buckling form on integral stability of gantry crane's supporting legs.

本文分析了门式起重机腿端约束，侧移及正、反对称屈曲形式对支腿整体稳定性的影响。

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Early on, we began to collect information about PC performance, tracking and identifying patterns of behavior that caused negative effects on speed and stability.

FORBES: Iolo Technologies Exec Explains How To Boost PC Games Performance

The Secretary-General is gravely concerned about the negative impact of this deeply destabilizing act on regional stability as well as the global efforts for nuclear non-proliferation.

CNN: World leaders react to North Korea's nuclear test

"Whether it's an old contract or not, it has a profoundly negative impact on the balance of interests and the stability of the region, and it does put Israel at risk, " he said.

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