frobn.开关旋钮; 调着玩froadv.来回（现仅用于to and fro短语中）Frohde's reagent福拉蒂frozen flow head"凝流"式流浆箱,束管稳流网前箱Frozen platelets冰冻血小板frozen water oat冻茭白frozen pork head冻猪头frozen frog meat冻田鸡肉frozen dowel bar冻结传力杆frozen pork tail冻猪尾frozen belt fish冻带鱼Frobenius method弗洛比尼斯法