noun · A parasitic insect that infests bedding and furniture, feeding on the blood of humans and animals at night.

由于卫生条件不佳，这间旧旅馆的床垫里藏有很多壁虱。

noun · A blood-sucking arachnid parasite that typically lives in tall grass and attaches itself to animals and humans.

这种壁虱可能会传播莱姆病，在草丛中行走要格外小心。