• 难耕地

heavy mud重钻泥heavyadj.大(量)的；重的；沉重的；猛烈的Heavy snow in winter冬季大雪heavy-duty service高负荷运行,重荷条件下使用heavy draught vessel深吃水船heavy duty rectifier大功率整流器heavy crepe de chine重绉heavy insulated tape高等级绝缘加热带heavy pontoon bridge重型舟桥heavy-tailed noise拖尾噪声heavy-duty crusher重型破碎机heavy-water system重水系统