| 单词 | growth ring |
| 释义 | growth ringBrE /ˈɡrəʊθ rɪŋ/ NAmE /ˈɡroʊθ rɪŋ/ noun a layer of wood , shell or bone developed in one year , or in another regular period of growth , that an expert can look at to find out how old sth is （树木、壳或骨等的）生长轮，年轮 |
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