FROF=Freight Office 货运处
froadv.来回(现仅用于to and fro短语中)
frozen- thawed embryo胚胎移植
frozen-thawed grouper解冻石斑鱼
frozen-thawed antigen冻融抗原
frozen dehumidification冷冻除湿
frozen ground mechanics冻土力学
frozen belt fish fillet冻带鱼片
frozen products chamber食品冷藏库
frozen fresh water fish速冻淡水鱼
frozen - mehig damage冻融破坏
frozen aquatic products冻水产品