single-axle bogie

例句：

1. 1. The train's single-axle bogie is designed to be lightweight and efficient.
   这列火车的单轴转向架设计得既轻便又高效。
2. 2.The engineer had to replace the single-axle bogie because it was worn out.
   工程师不得不更换单轴转向架，因为它已经磨损了。
3. 3. The new model of the train has a single-axle bogie that can handle heavier loads.
   这列新火车的单轴转向架可以承受更重的负荷。