当多数树脂道普遍破损时，与接种点距离远近不同的部位细胞病变已无明显差异。
When the pine resin ducts were widely destroyed, there were no obvious differences between the cells in different positions.
当多数树脂道普遍破损时，与接种点距离远近不同的部位细胞病变已无明显差异。
When the pine resin ducts were widely destroyed, there were no obvious differences between the cells in different positions.
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