toughness
英 美['t?fn?s]
- n. [力] 韌性；強(qiáng)健；有粘性
英英釋意
- 1. enduring strength and energy
- 2. the property of being big and strong
- 3. the elasticity and hardness of a metal object; its ability to absorb considerable energy before cracking
- 4. impressive difficulty