The engine was shielded and steel fasteners were replaced by brass or nylon.发动机被保护起来, 钢制的扣件换成了铜制的或尼龙的。
英汉双解词典包含368430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。