training wheels
noun /ˈtreɪnɪŋ wiːlz/
/ˈtreɪnɪŋ wiːlz/
(North American English) (British English stabilizers)
[plural]- enlarge imagesmall wheels that are fitted at each side of the back wheel on a child’s bicycle to stop it from falling over
(儿童自行车后轮两侧的)稳定轮