| 单词 | 外壳硬 |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔caseharden〕To harden the surface or case of (iron or steel) by high-temperature shallow infusion of carbon followed by quenching.表面渗碳硬化法：通过高温条件下对碳的浅层注入并紧接冷却来使（铁或钢的）表面或外壳硬化美国传统〔mangosteen〕The berry of this tree, having a hard rind and five to seven seeds with a sweet juicy aril.莽吉柿：这种乔木的果实，外壳硬，内有五至七粒种子，其假种皮甜且多汁美国传统 |
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