register

n.登记；挂号 v.登记；挂号邮寄

regency, regenerate, regeneration, regenerative, regent, regent (often 常作 Regent), reggae, regicide, regime, regimen, regiment, regimental, regimentals, regimentation, Regina, region, regional, regionalization, regionalize, regionally, register office, registered, registered nurse, registered post, registered trade mark, registrar, registration, registration number, registry, registry office (also `register office), Regius professor, regnant (often 常作 Regnant), regress, regression, regressive, regret, regretful, regretfully, regrettable, regrettably,