tricycle

汉语翻译

英语解释：

名词 tricycle:

1. a vehicle with three wheels that is moved by foot pedals
   同义词：trike, velocipede

例句：

1. Our son has just graduated from a tricycle to a proper bicycle.
   我们的儿子刚刚从骑三轮自行车过渡到骑普通自行车了。