1. 锻炼：通过锻炼(hardening)之后,植物的含水量发生变化,自由水减少,束缚水相对增多;膜不饱和脂肪酸也增多,膜相变的温度降低;同化物积累明显,特别是糖的积累;激素比例发生改变,脱水能力显著提高.

2. 淬火：淬火冷却 quench | 淬火 hardening | 回火 tempering

3. 淬水：temper回火 | hardening淬水 | annealing退火

noun

1. the act of making something harder (firmer or tighter or more compact)

2. the process of becoming hard or solid by cooling or drying or crystallization

    e.g. the hardening of concrete
           he tested the set of the glue

    Synonym: solidifyingsolidificationsetcuring

3. abnormal hardening or thickening of tissue