The unstable tree processing is a bit different than the stable tree.
不稳定树的处理与稳定树的处理有一些不同。
When they are stable, you can merge branches back to the main tree.
当分支稳定后，再将分支与主树进行合并。
If the product on a tree the tree should be well secured and stable.
如果产品放在树上，必须将其固定好。
If the product on a tree the tree should be well secured and stable.
如果产品放在树上，必须将其固定好。
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