母婴感染是非常常见的，所以人们很容易提出这样的质疑：假如感染是精神分裂症的病因，为什么没有更多的新生儿成为患者呢？
Maternal and intrauterine infections are notably common, so one question is that if schizophrenia is infectious in origin, why aren't more offspring born with schizophrenia?
在非洲大陆的其他地方，人们都在质疑，为什么他们没有从位于土壤之下的丰富矿产得到更多的财富。
In other parts of the continent, people are questioning why they aren't getting more for the mineral riches that lie in abundance beneath Africa's soil.
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