attempt to试图

例句：Henry attempted to secure the succession to the office.
      亨利试图继承这个职位。

2.Others compare it to someone driving a sharp object into the head.

compare to把…比作, 喻为

例句：Shakespeare compared the world to a stage.
      莎士比亚把世界比作舞台。

3.Some scientists now believe that tension headaches may result from changes among brain chemicals such as serotonin.

result from产生于…, 由…引起

例句：Nothing had resulted from our efforts.
      我们的努力没有产生什么结果。

      His failure resulted from not working hard enough.
      他的失败是工作不够努力造成的。