所以，适当稀播可以培育壮根，增强根系活力，充分发挥土壤、特别是深层土壤的作用。
Therefore, properly sparse-sowing was favourable to cultivate strong roots, increase root activity and bring the yield-increasing function of soil, especially of deep soil into full play.
但是最戏剧性的变化发生在地下，生长在地下的竹根长得很壮。
But the most dramatic growth is underground, where the roots grow very strong.
刘家壮给出了生成根树的一种算法。
Liu Jiazhuang proposed an algorithm for generating rooted trees.
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