美国医疗体系性能持续下降，远远低于可能实现的标准，尤其是考虑到国家致力于健康的公共和私人资源的艰巨性。

U. S. health system performance continues to fall far short of what is attainable, especially given the enormity of public and private resources devoted nationally to health.

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实验表明，经改造后的发动机的动力性与原机相当，初步测试表明其怠速排放性能远低于我国现行标准GB14761.5—93。

The experiment shows that the power of converted engine is the same of the base engine, the emission at idle condition is lower than the national regulation GB14761.5-93.

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