| 单词 | concavities |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔concavity〕The large concavities along the wall of the restaurant are like private rooms.沿餐馆墙壁的那些大块凹陷就像是一个个包间。韦氏高阶〔conchoidal〕Of, relating to, or being a surface characterized by smooth, shell-like convexities and concavities, as on fractured obsidian.贝壳状的：（属于）表面光滑且呈贝壳状凸凹特点的、或与之有关的，如黑曜石碎块美国传统 |
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