frobn.开关旋钮; 调着玩froadv.来回（现仅用于to and fro短语中）frozen cockerel冻雏鸡frozen pork ham冻火腿frozen sandwich冰冻三明治frozen pheasant冻山鸡frozen prepared冷冻调理froude pendulum弗劳德摆frozen hind leg冻后腿frozen ox tongue冻牛舌frozen wild boar冻野猪frozen pork nape冻猪颈背肉