1 sentence

1. 为什么这些发达国家癌症发病率这么高呢？

   wèi​shén​me zhè​xiē fā​dá​guó​jiā ái​zhèng fā​bìng​lǜ zhè​me gāo ne?

   Why does the developed world have such high rates of cancer?

   Source: CCMatrix