frobn.开关旋钮; 调着玩
froadv.来回(现仅用于to and fro短语中)
frozen rice bird冻稻鸟
frozen beef lung冻牛肺
frozen pien fish冻鳊鱼
frozen crab meat冻蟹肉
frozen provision冻结款项
frozen lean meat冻瘦肉
frozen baby clam冻蚬肉
frozen clam meat冻文蛤肉
frozen soil wall冻土墙
frozen red cells冷冻红细胞