growth ring
noun /ˈɡrəʊθ rɪŋ/
/ˈɡrəʊθ rɪŋ/
- 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 something is
| 单词 | growth ring |
| 释义 | growth ringnoun /ˈɡrəʊθ rɪŋ/ /ˈɡrəʊθ rɪŋ/
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