retraction

n. 缩进,取消,撤回

reticence, reticent, reticently, reticulated, reticulation, reticule, retina, retinue, retire, retired, retirement, retirement age, retiring, retort, retouch, retrace, retract, retractability, retractable, retractile, retread, retreat, retrench, retrenchment, retrial, retribution, retributive, retrievable, retrieval, retrieve, retriever, retro-, retro-rocket, retroactive, retroactively, retroflex, retrograde, retrogress, retrogression, retrogressive,