jacks [dʒæks]

例句:

• The small British crowd roared themselves hoarse, waving their Union Jacks.
  一小群英国人挥舞着国旗，吼得嗓子都沙哑了。
  
• Hydraulic jacks under the machine produce the movement.
  是机器下面的液压千斤顶造成的移动.
  
• The front end is equipped with hydraulic jacks used for grade adjustment.
  前瑞安装有液压千斤顶用来调整坡度.
  
• We waved Union Jacks and gave her ten-minute standing ovations.
  来自THETIMES
• Or 'Jacks' as you'd wish to call them here.
  来自BBC
• How much did your heart rate increase after the jumping jacks?
  来自SA