采用何种方法进行种群分布格局的分析研究一直是一个争论性问题。
Following conclusions were obtained from comparison of various methods used in spruce population spatial distribution pattern on sandy sites.
考虑到有限的效用，美国和他的盟友们现在必须要决定所有建立禁飞区涉及到的麻烦—包括合法性问题的持续争论—是否值得去冒险。
Given the limited utility then, the U. S. and its Allies must now decide if all the trouble involved in setting up a zone — including inevitable questions of legality — are worth the risk.
考虑到有限的效用，美国和他的盟友们现在必须要决定所有建立禁飞区涉及到的麻烦—包括合法性问题的持续争论—是否值得去冒险。
Given the limited utility then, the U.S. and its Allies must now decide if all the trouble involved in setting up a zone — including inevitable questions of legality — are worth the risk.
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