齿轮的英文：
gear

• There axe wheels within wheels.
  齿轮中有齿轮(幕后另有操纵者)。
• gear single flank rolling tester
  齿轮单面啮合检查仪
• Gearing [UK]; leverage
  齿轮作用[英国];杠杆作用
• planetary gearing
  行星齿轮传动
• From this technique and the relation to an old cog wheel, the test was called a cogging test
  人们根据这一方法以及它与旧齿轮的关系把该试验称为“齿轮周节试验”。
• The two cog wheels engaged and the machine started.
  那两个齿轮啮合后机器就转动了。
• The two cog-wheels engaged and the machine started.
  那两个齿轮一啮合,机器就启动了.
• One cog-wheel engages with another.
  一齿轮与另一齿轮啮合.
• cross helical gear
  螺旋齿轮,交错斜齿轮
• Bevel gear either of a pair of gears with sloping toothed edges
  伞齿轮;锥齿轮.

• The rotation of this gear on a hub or shaft drives other gears.
  安装在衬套或轴上的齿轮的旋转带动其它齿轮转动。
• leave a car in neutral gear
  让汽车排挡置于空挡位置
• worm and wheel steering gear
  蜗杆蜗轮转向机构
• (of an automobile) high (or top) gear
  高速挡
• He shifted the gear into revers.
  他把排档换成倒档。