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| 单词 | tree-ring |
| 释义 | > as lemmastree-ring tree-ring n. an annual growth ring in the trunk of a tree. ΘΚΠ the world > plants > part of plant > part of tree or woody plant > wood > [noun] > ring or layer insertion1624 ring1664 annual ring1672 year1708 year ring1845 growth ring1907 tree-ring1919 1919 A. E. Douglass Climatic Cycles & Tree-growth iii. 23 The plan of using tree-rings for the general purpose of a check on astronomical and meteorological phenomena was first formulated in 1901. 1982 Nature 6 May 28/1 Others have sought an explanation of..variations in tree rings. < as lemmas |
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