rigidity--- An instance of being rigid僵化，严厉=stiffness

revise--- To reconsider and change or modify修改，修正=change

retrieve--- To get back; regain.重获；收复；=recover, To get back; regain.重获；收复；重新得到=bring back

To rectify the unfavorable consequences of; remedy. See: recover

restrict--- To keep or confine within limits限制=limit

retain--- To maintain possession of保持=keep

representation--- The state or condition of serving as an official delegate, agent, or spokesperson代表=delegate, stand for

resemble--- To exhibit similarity or likeness to类似=similar

renounce--- To reject; disown拒绝=reject To refuse to accept, submit to, believe, or make use of拒绝

replace-- To take or fill the place of取代=supplant To displace and substitute for (another)取代，代替(另一个)

release--- To free from something that binds, fastens, or holds back; let go松开=give off

refreshing--- Pleasantly fresh and different新鲜宜人的，与众不同的=unusual

reflection--- A manifestation or result显示，结果=indicate To suggest or demonstrate the necessity, expedience, or advisability of说明，显示，暗示

receptacle--- A container that holds items or matter贮藏器=container

recognize--- To show awareness of; approve of or appreciate赏识=appreciate

rarefy--- To make thin, less compact, or less dense使稀薄=infrequent

rear--- To lift upright; raise直立起；抬高=raise

radical--- Departing markedly from the usual or customary; extreme极端的=drastic Severe or radical in nature; extreme严厉或剧烈的；极端的

symmetrical--- Of or exhibiting symmetry对称的=proportionally balanced

synthetic--- Produced by synthesis, especially not of natural origin.合成的=formation, integrate

Not natural or genuine; artificial or contrived人造的，不自然的=artificial