Disease is not likely to be the most important factor in whether the world's population will spike. Drought and ignorance are much more likely candidates.

疾病似乎并不是影响世界人口是否激增的主要因素，而干旱和无知更像是潜在原因。

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The first and perhaps key factor is the ignorance of sanitation.

第一个也是最重要的一个因素是人们缺乏卫生意识。

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And ignorance to universal existence of transaction cost covers the essence of problem and makes us missing the key factor of empirical analysis.

而广泛存在的对交易费用的忽视，更掩盖了问题的实质，错过了实证分析最关键的要素。

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