1. Tricycles are lined up on the floor of the pool seven feet under water.
    在7英尺深的池底上把三轮车排好队。

1. tricycle

1. 三轮车, 机器三轮车：toxophore 毒性基因, 带毒体 | tricycle 三轮车, 机器三轮车 | the last ditch 最后一道防线 最后一着

2. 三轮脚踏车：Pedal 汽车;踩......的踏板 | Tricycle三轮脚踏车 | Single 单程票

3. tricycle

3. 三轮车 ; 三轮脚踏车：Tricar 三轮汽车 | Tricycle 三轮车 ; 三轮脚踏车 | Unicycle 单轮脚踏车

1. (通常指儿童骑的)三轮脚踏车
    A tricycle is a cycle with three wheels, two at the back and one at the front. Tricycles are usually ridden by children.

tricycle是什么意思

1. a vehicle with three wheels that is moved by foot pedals

    Synonym: trikevelocipede