•Spiders ensnare flies and other insects in their webs.蜘蛛用网来捕捉苍蝇及其他昆虫。

•They wanted to make a formal complaint about their doctor, but ended up ensnared in the complexities of the legal system.他们的初衷是对其医生提出正式控诉，结果却陷入了法律体系的繁复程式之中。