短语词组短语underhand service 下手发球;低手发球;动手发球underhand stroke 低手击球;下手击球underhand stope 下向梯段工祖;下向回采underhand means 不正当的手段Underhand Serve 下手发球underhand shot 低手投篮;低手射门;低手发球underhand attack 下手攻击underhand d 秘密既underhand toss 下手抛球 返回 underhand