1、

The density of the stand for producing middle pole trees should be 3 460 tree per hectare, the spacing should be 1.7m × 1.7m. ( 2) high planting density and severe thinning regime is favorable to all kind of timber production;

中径材1.7m×1.7m,3460株/hm2。(2)采用较高的初植密度,并采用强度较大的间伐机制,对小径材和大、中径材的生产都是有利的;

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2、

Towards the middle of the above digitally stretched picture is the North Celestial Pole ( NCP), easily identified as the point in the sky at the center of all the star trail arcs.

这张数码合成照片的中心位置是北天极,作为天空中所有星迹圆弧的中心点,北天极很容易找到。

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4、

Loudi located the middle of Hunan province, is not only the important pole of "3+ 5" urban agglomeration, but also the important hinter of "Chang-Zhu-Tan double-type society ( resource-saving and environment-friendly) reform experimental area".

处于湖南省中部的娄底市不仅是湖南省3+5城市群的重要一极,也是长株潭两型社会综合配套改革试验区的重要腹地。

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5、

The Forming and Eliminating of Psychological Barrier of Middle School Students in Pole Vault Teaching A Practical Study on Imagery Training in Pole Vault Teaching

撑竿跳高教学中学生心理障碍的成因及消除方法表象训练在撑杆跳高技术教学中的应用研究

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6、

Middle transverse pole arrangement, suitable for milling work.

中间横向极块的安排, 可以适合磨床工件.

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