But current forest management practices, including fire suppression, often create forests full of trees of uniform age, which are particularly susceptible.
但是包括扑火在内的现有林务实践，经常创造年龄段均一的树林，这种树林对于环境变化是很敏感的。
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Yet after her death at age 100, Grace Groner left Lake Forest College a gift of $7 million to be used for scholarships.
How to manage optimally and make use of the resource will play an important role in sustained-yield forest management in Heilongjiang province and determining the ageof harvest cutting is the key.