| 单词 | concretions |
| 释义 | DEFINITIVE EXAMPLES 权威例句〔lithiasis〕Pathological formation of mineral concretions in the body.结石病：因体内矿物凝结而形成的病状美国传统〔septarium〕An irregular polygonal system of calcite-filled cracks occurring in certain rock concretions.龟背石，凝岩球：发生在特定的岩石结核体中，由方解石填充的不规则多边形裂缝形成的系统美国传统〔thunderstone〕Any of various mineral concretions, such as a belemnite, formerly supposed to be thunderbolts.箭石，雷石，陨石：如过去被认为是雷电的箭石等各种矿物混合美国传统 |
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