However, their effects are probably accentuated by climatic factors, such as drought and hard winters, or soil imbalances such as soil acidification, which damages the roots.
然而，它们的影响可能因气候因素而加剧，如干旱和严冬，或因土壤酸化等土壤不平衡而损害到根系。
2
Soil acidification can be the result of acid rain.
土壤酸化可能是酸雨的结果。
3
But singling out the role of acidification will be hard.