region.区；部位regabbr.地区（=region）abbr.登记（=register）abbr.有规则的（=regular）regenerative response再生反应regurgitation of food饭食反流regenerative feedback再生回授,正回授,正反馈regenerative repeater再生增音器,再生中继器regulating valve seat调节阀座regio cruris anterior小腿前区regulators'reputation虹膜退缩Regulatory Strictness监管强度regtardation of fetus枯胎regio genus posterior膝后区