refrigerant

n substance that refrigerates, eg liquid carbon dioxide 致冷剂（如液态二氧化碳）; 冷冻剂.

reflexion, reflexive, refloat, refocus, reforest, reform, reformation, reformatory, reformed, reformer, reformulate, refract, refraction, refractory, refrain, refrain from, refresh, refresher course, refreshing, refreshment, refrigerate, refrigeration, refrigerator, refuel, refuge, refugee, refulgence, refulgent, refund, refundable, refurbish, refusal, refuse, refuse collector, refuse to do, refutable, refutation, refute, regain, regal,