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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