旋转轴的英文：
axis of rotation
revolution axis
revolving shaft
revolving spindle
rotation axis
symmetry axis

• The centre of gravity is displaced by a weight below the rotational axis.
  调节旋转轴之下的一个重物，使重心发生位移。
• The centre of gravity is displaced by a weight below the rotational axis
  调节旋转轴之下的一个重物，使重心发生位移。
• Gear: Machine component consisting of a toothed wheel attached to a rotating shaft.
  齿轮：一种机械零件，固定在旋转轴上的带齿的轮子。
• Flywheel：Heavy wheel attached to a rotating shaft to smooth out delivery of power from a motor to a machine.
  飞轮:装在旋转轴上，使发动机的动力平稳地传给机器的一个很重的轮子。

• transverse axis
  【数】横截轴
• three-axis trainer
  三自由度练习器
• Next to or facing the main stem or axis.
  近茎轴一侧的紧挨着主茎或轴的，面向主茎或轴的

• The crankshaft makes three rotations for each rotation of the rotor.
  转子每转一周，曲轴转3周。
• eddy current rotating brake
  涡流旋转制动机
• There will have to be a more defined playing rotation.
  必须要有一个更详细的比赛轮转计划。

• We regard reform as a revolution -- not as a ``cultural revolution'' of course.
  我们把改革当作一种革命，当然不是“文化大革命”那样的革命。
• The French Revolution was inspired by the bourgeois.
  法国革命受到中产阶级的鼓励。
• The revolution threatened the interests of the Bourgeois.
  这场革命威胁到这些资本家的利益。