The safety net has ensured that in the 75 years since its establishment, no mutual banks have filed for bankruptcy, S&P notes.
标普指出，这个安全网自其创立以来的75年中，确保了没有任何互助银行进入破产程序。
Phosphorus (p) is one of the main limiting nutrients to the plant growth and net primary productivity (NPP) in terrestrial ecosystem.
磷元素是陆地植物生长和生态系统净初级生产力的主要限制因子之一。
The result of three years from 1997 to 1999 showed significant effect of post grazing residual and P level on seasonal and annual net production of the sown pasture under sheep rotational grazing.
三年试验结果表明，绵羊在轮牧下，产草量和磷肥对全年及各月牧草净生产具有显著影响。
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