v.擦( rub的第三人称单数 )；擦掉；涂；（使）相互磨擦 双语释义：v.(动词)vt. 擦; 搓; 揉 move one thing backwards and forwards on the surface of (another)vt. & vi. 接触; 摩擦 come into, or be in, contact with, by a sliding or up and down movement英英释义： rubn.an unforeseen obstacle同义词：hang-uphitc