| 单词 | toughness |
| 释义 | Word Frequency toughness(ˈtʌfnɪs) noun 1. the quality or an instance of being tough 2. metallurgy the ability of a metal to withstand repeated twisting and bending, measured by the energy in kilojoules needed to break it brittleness (sense 2), softness (sense 2) |
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