- 更多网络例句与使人为物相关的网络例句 [注:此内容来源于网络,仅供参考]
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Macrophanerophytes such as pine and cedar are more and occupie greater percentage to from bottom to top, which are affected by clime and geography and human avtivity. Because people pay more attention to Macrophanerophytes and less to shrub and herbge plants, ecology of the forest is unbalance and benefit is low.
在整个沉积物柱的孢粉组合中,松、杉等大型乔木始终占有很高的比例,而且越到上部比例越大,这除了受滇中地区气候地理因素的影响外,可能还有人为的原因,人们在保护森林资源和植树造林过程中往往只是注重了大型的乔木而忽视了灌木和草本植物,从而使森林生态失衡,生态效益低下。
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Although these combined relative error γ.1%, in order to obtain more precise measurement results, it should be pay attention for the level of the torsion pendulum, the uprightness between the photoelectric doors and the block rod, the location of the being measured substance, the similarity of the shape and the quality between the standard object and the being measured object, human factors and so on.
利用扭摆法测量物体的转动惯量,受到待测物体摆动周期测量误差、装配位置偏移误差和轴线倾斜误差的影响,虽然这些相对误差总合γ。1%,为了使测量结果是加精确,实践中应该注意扭摆的水平、光电门与挡光杆的垂直、待测物重心的位置、人为误差的影响以及待测物与标准件形状、质量的相近性等。