事物

thing; -thing; -object

外部

external; exterior; outside; surface; outer; outward; extrinsic

联系

contact; link; get in touch with; connect; associate; relate; reach; situate; communicate; link up; connect with; make contact; get in touch; liaise; look up; interface; tie up; connection; relation; tie; communication; nexus; tie-up; association; relationship; bond; in touch; in touch with