他们选择用于编制生活质量指数的，是四个被广泛测量并得到充分研究的指数：人均GDP、出生时的预期寿命、婴儿死亡率以及肺结核病的发病率。

They chose several widely-measured and well-studied indices on which to base their index: GDP per capita, life expectancy at birth, infant mortality rate and the incidence of tuberculosis.

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尽管这份新报告的内容让人沮丧，尤其是有关艾滋病、肺结核和非洲的疟疾等部分，但全球范围儿童死亡率下降却是一个乐观迹象。

Despite the new report frustrating, especially AIDS, tuberculosis and malaria in Africa, but a global decline in child mortality is a sign of optimism.

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我们已经饱受如艾滋病，肺结核及疟疾这样的全球性疫情的侵袭。而流感疫情与其他病所不同的是，它很容易传染。在美国，季节性流感是死亡率最高的十种病之一；

That deaths from the new virus have mostly been confined to Mexico is probably a consequence of its having appeared there first and spread, under cover of normal seasonal flu, without anyone noticing.

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