If the optimum density of forest road network is to be obtained in a piece of cutting area,the ways of yarding need optimum choosing.
林
网合理
是相对于集材方式而言
，在一片伐区上要得到最佳林网，
要进行集材方式优选。
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But the human mind can glimpse a rapidly changing scene and immediately disregard the 98 percent that is irrelevant, instantaneously focusing on the monkey at the side of a winding forest road or the single suspicious face in a big crowd.
但是人大脑能够扫描一个快速变
景，迅速排除 98％不相干物体，立即聚焦于森林中
蜒道路旁一只猴子，或者人群中一张可疑
。
周刊 (Time) 15But the human mind can glimpse a rapidly changing scene and immediately disregard the 98 percent that is irrelevant, instantaneously focusing on the monkey at the side of a winding forest road or the single suspicious face in a big crowd.
15但人类
思维可以瞥见快速变
景， 并立即忽略 98% 不相关内容，立即将注意力集中在蜿蜒林道旁猴子或一大群人中唯一可疑面孔上。
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