plot observer

例句：

1. 1. 观察者
   尤指在犯罪或秘密活动中的
2. 1.The police detective is a plot observer who carefully follows every detail of the case.
   这位警察侦探是一名细致的案件观察者，仔细追踪每一个细节。
3. 2. The scientist was an instigator of the experiment, planning and executing it with care.
   这位科学家是实验的策划者和执行者，他小心谨慎地规划并执行了实验。
4. 3. The spy was a plot observer, watching for any signs of treachery from his colleagues.
   这个间谍是一个观察者，监视他的同事们是否有背叛的迹象。