Why do understory trees, which are subject to lower sheer forces from the wind than the big canopy trees, why are they so much tougher and harder to break than the canopy trees are?
低木層の木は 風から受ける力も弱く 大きな樹冠木よりも 軽い重量しか担っていないのに 樹冠木よりもずっと強く 折れにくいのでしょう？