转而向森林园艺以及其他形式的永续农业来谋求出路比较困难，尤其是在生产粮食方面；然而这种紧急情况蔓延的态势已经到了如此地步，排除任何救治之道都让我们承受不起。
A switch to forest gardening and other forms of permaculture is trickier, especially for producing grain; but such is the scale of the creeping emergency that we can't afford to rule anything out.
异龄林经营决策是一个涉及到森林的经济效益和永续利用等多个目标的决策问题。
In this paper, the problem of uneven-aged forest management decision making is considered as a problem of multi-objective decision making.
如何合理地经营利用好这部分资源，对该省森林永续经营利用起到重要作用，其主伐年龄的确定是关键问题。
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 age of harvest cutting is the key.
应用推荐