指繁殖材料的生理衰老导致再生作用降低，不定根发生能力减退的现象。
无性繁殖在林业中应用很普遍，而由树木发育阶段转变带来的成熟效应问题，一直是无性系造林的障碍。
Vegetative propagation is widely used in forestry, however, the maturation that due to phase changes during tree development is a huge obstacle.
上证180指数调整效应所表现出来的明显不同于成熟市场的特征反映了我国股票市场弱有效性的特征。
The effects of the revisions to the SSE180 index are evidently different from matured stock markets and reflects that Chinese stock market is weak-efficient.
现在，一组研究人员已经发现一种新的机制，这个机制决定了可能由胸腺产生的一个成熟T细胞是否作为一个效应细胞或者一个调节细胞。
Now, a team of researchers has discovered a novel mechanism determining whether a maturing t cell is likely to emerge from the thymus as an effector cell or a regulatory cell.
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