hard/tough as nails idiom
冷酷无情的，铁石心肠的
not feeling or showing any emotions such as sympathy, fear, or worry
| 单词 | hard/tough as nails |
| 释义 | hard/tough as nails idiom 冷酷无情的，铁石心肠的 not feeling or showing any emotions such as sympathy, fear, or worry |
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