辅助轮 meaning in Chinese

training wheel

But those rusted training wheels
但是那些生锈的辅助轮呢？
Courage is riding your bicycle for the first time without training wheels
勇气，是第一次骑脚踏车，不装辅助轮。
After i got out of the hospital , my folks bought me a bicycle , but i never lost my fear of riding without the training wheels
出院后，家人给我买了辆自行车，但只要是骑上没有辅助轮的自行车我就会发慌。