双人自行车的英文：
tandem bicycle

参考例句：

I've never ridden a tandem bicycle before.
我从来没骑过双人自行车。

They ride tandem on a bicycle built for two.
他们一前一后地骑着双人自行车。

Team work is vital in any sport, but tandem riding takes working as a pair to the extreme．
团体合作在任何运动项目中都至关重要，但是双人自行车赛将两个人的配合发挥到了极限。

bicycle是什么意思：
n. 自行车，脚踏车，单车
v. 骑自行车

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。