... 环状一价染色体：closed univalent 环状胜：ring bark 环状珊焊：atoll ...
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... 环状加厚 annular thickening 环状树皮 ring bark 环状芽接 annular budding ...
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inversed ring-bark grafting 环状倒贴皮
inverted ring of bark method 树皮倒转嵌接法
bark ring incision 环切
·2,447,543篇论文数据，部分数据来源于NoteExpress
Using a hollow tube, they drill into the tree and extract a 5-mm wide cylinder that shows each ring starting with the most recent, just under the bark.
VOA: standard.2010.04.05
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