double springs造句

• Pole system fem analysis of double spring model
  双弹簧地基模型的杆系有限元分析
• He was luxuriously stretched in a good english calash , with double springs ; he was drawn by four good horses , at full gallop ; he knew the relay to be at a distance of seven leagues
  他现在舒舒服服地躺在一辆华丽的英国马车里，身下有双重弹簧座垫，由四匹好马拉着车子疾驶。他知道离前面的驿站只有二十哩路了。