fourth gear

短语

词形变化

fourth gears 复数 fourth gears

释义与例句

n.
  1. 1.

    The fourth of the available gears in a transmission or other gearbox.

    可数 不可数
  2. 2.

    A maximal level of effort.

    可数 过时 习语 不可数

词源

The figurative sense reflects that in some times and places, fourth gear was the highest gear that a car could achieve; compare French en quatrième vitesse.

来源：wiktionary