音标发音英式音标 [ˈtreɪ.nɪŋ ˌwiːlz]美式音标 [ˈtreɪ.nɪŋ ˌwiːlz]英式发音 美式发音 基本解释（兒童學騎自行車時安裝在後輪兩側的）穩定輪。同根派生 training wheels相关词英英字典劍橋英英字典 small wheels attached to each side of the back wheel of a bicycle to prevent it from falling over when a child is learning to ride ittraining wheels剑桥字典training wheels柯林斯字典