extra ply附加层extraadj.额外的n.额外之物；临时演员adv.特别地extrajudicial settlement庭外解决Extrapyramidal reactions锥体外系反应extra cost of wind power风电额外成本extra sensory perception动物特别的感知能力； ph.；超感知觉extracurricular training课余训练extranuclear ingeritance核外遗传extra high voltage cable极高压电缆extra P.E. activityP课余体育活动extra - party movement党外运动extrajunctional receptor接头外受体