TPO 30 阅读第3篇 第5题The author uses the phrase “the timekeeper of last resort” ...为什么答案是

last resort 含义为最后依据。原文提到机械钟 driving out water clocks but not solar dials,指的是淘汰了水钟,但是留下了太阳钟,后面又说要 check the new machines ,显然是 solar dials were needed to check the new machines ,由此可以看出 the timekeeper of last resort 指的是太阳,即太阳是核对机械钟准确度的最后依据,所以答案选 B。