| 单词 | hard and fast |
| 释义 | hard and fast hard-and-fast adj: (rule: strictly enforced) (规则等) SC 不能更改的，不容变通的 bù néng gēng gǎi de，bù róng biàn tōng de The company has no hard-and-fast dress code, but everyone wears a business suit. hard-and-fast rule n: (rule: unbreakable) SC 不能变通的规则 SC 硬性规则 There's no hard-and-fast rule about what makes good picnic food. |
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