hardenv.(使)变硬;(使)坚强
harden muscles使肌肉结实
hardened early硬化早期
hardening room硬化室,淬火车间
hardened steeln.淬火钢
hardened glass钢化玻璃
hardening heat淬火温度
hardening rule硬化规则
hardening laws硬化规律
hardened layer硬化层
hardening agent硬化剂