奸细: spy; enemy agent 短语和例子那个共产党员被奸细钉梢。 the communist is shadowed by spies
安插: place in a certain position; assign to a job; plant 短语和例子安插奸细 plant an enemy agent; 安插亲信 place one's trusted followers in key positions; 作者在这里安插了一段倒叙。 at this point the writer puts in [ins