ironing

• He stricks while the iron is hot .
  他善于利用时机。
• Many years ago men first heated iron ore in a fire .
  许多年前，人们初次在火中锻烧矿石。
• Damp clothes iron press easily .
  湿衣服容易烫平。
• Iron casts better than copper .
  铁比铜容易铸型。
• A coarser grade of iron will lower the yield of ferrocene .
  粗粒的铁将降低二茂铁的产量。
• Changing iron into steel is a process of purifying the iron .
  把铁炼成钢是铁的精炼过程。
• Wealthy countries restrain the export of scrap iron and steel .
  富裕国家限制出口废钢铁。
• Find fs if the plate is made of class 25 cast iron .
  如果这板是由25号铸铁制造的，求FS值。
• The iron army never gives .
  “铁军”永不退却。
• We all call him iron ox .
  我们都称他“铁牛”。