A person who is intrusively or overly dependent upon another; a parasite.

寄生虫剥夺别人利益或过分依赖他人生活的人；

Pervasive computing is the integration of cyberspace and physical space. In this incorporated space, users can obtain services non-intrusively anytime and anywhere.

普适 计算是信息空间与物理空间的融合，在这融合的空间中，人们可以随时随地透明的获取所需要的 服务。