短语词组短语stiffen flow 粘滞流stiffen n 使僵硬;使硬stiffen plate 加强板stiffen concrete 劲性混凝土stiffen syrup 浓糖浆kidney stiffen 肾脏纤维化Stiffen Steel 钢筋硬化stiffen ratio 刚度比Limbs stiffen 四肢僵硬 返回 stiffen