| 单词 | training wheels |
| 释义 | training wheels training wheels pl.n.（复数名词）A pair of small wheels attached to the rear axle of a bicycle so that beginning riders can ride without falling over.训练用轮子：安装于脚踏车后车轴的一对小型轮子，藉此初学骑脚踏车的人不至于翻覆 |
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