In plural. The science which relates to the construction of machines. Obsolete.
With singular or (occasionally) plural agreement:(a) the body of theoretical and practical knowledge concerned with the invention and construction of…
英语词典包含1132095条英英释义在线翻译词条,基本涵盖了全部常用单词的英英翻译及用法,是英语学习的有利工具。