你必须把那棵死树砍了，否则它会倒在你的屋顶上。
You must cut down that dead tree or it will fall on your house.
通过如下方式维护和保养树木和灌木：剪枝和修型，施肥和喷杀虫剂，去除死树和朽树，并建议如何进行日常护理。
Maintains and CARES for trees and shrubs by lopping limbs and shaping branches, treating trees with fertilisers and insecticides, removing dead or decaying trees, and advising on general tree care.
而且，死树不是仅仅为害虫提供栖息地，鸟类和其他昆虫也会居于与此，这些鸟类和昆虫对于森林的长期健康是有利的。
And of course dead trees do not provide habitats only for harmful insects. They are also used by birds and other insects that are important contributors to the long-term health of forests.
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