时钟在繁殖期间持续运转，然后停止，再在下一个秋天复苏。
The clock continues to run through breeding time, then stops-to be re-wound again the next fall.
繁殖无性系也可以在较短期间内提供较大的增益。
Clonal propagation can also give some large gains in a relatively short time.
在节枝及繁殖期间﹐激励新的组织生长和修复。
Encourage new tissue growth to repair damage incurred during fragmentation and propagation.
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