两个轮子的的英文：
bicyclic

The teeth on those two wheels mesh as the wheels revolve.
轮子转动时，那两个轮子上的齿就啮合了。

The bicycle doctor is doctoring my bicycle.
自行车修理工正给我修自行车。

The bicycles are kept under a shed.
自行车存放在车棚下面。

bicycle luggage carrier
自行车行李架

They like riding bicycles.
他们爱骑自行车。

I have a light bicycle.
我有量轻便的自行车。