To do so, I divided thebook into two parts. In part one, I describe the philosophical foundations ofdigital minimalism, starting with an examination of the forces that are makingso many people’s digital lives increasingly intolerable, before moving on to adetailed discussion of the digital minimalism philosophy.
上面的句子摘自2023高考考试英语新全国卷1阅读理解C的第2段。
请问：part one, part two等表达可以小写首字吗？又如 lesson one, lesson two,book one, book two 等也可以小写首字母吗？
若是在正文中，part one, part two, lesson one,lesson two, book one, book two 等完全可以小写首字母，而且一般小写首字母。但若是用作标题，则既能够大写首字母，也可以将全部字母大写（视标题的整体风格而定）。
