training wheel

短语

辅助轮

发音

UK /ˈtɹeɪnɪŋ wiːl/
其它
US /ˈtreɪnɪŋ ˌ(h)wil/

词形变化

training wheels 复数 training wheels

释义与例句

n.
  1. 1.

    A wheel forming part of the machinery of a cannon or a similar firearm which is turned to train or aim the weapon at a target.

    历史 政治 军事
  2. 2.

    Synonym of trailing wheel (“on a steam locomotive, an unpowered wheel or axle located behind the driving wheels”).

    古体 交通
  3. 3.

    One of a pair of small wheels, each attached to one side of a bicycle's rear wheel to provide support for new riders.

    辅助轮

    加拿大 美国 体育

词源

From training (“relating to the moving of a firearm laterally so that it points in a different direction; relating to imparting and acquiring skills”) + wheel.

来源：wiktionary