Having gearing in which the ratio between the driving mechanism and the driven wheel is large; (in extended use) fast-moving, active.
Late 18th century; earliest use found in Oliver Evans (1755–1819).
英汉双解词典包含464360条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。