本文提出了一种仅变换置镜点和后视点坐标而达到置镜任一点极坐标法测设整条曲线的方法。
A method of surveying a complete curve in polar coordinate system by only changing instrument position and back viewing point are introduced in this paper.
由于这些儿童的年龄已经不适合对婴儿使用的注视点研究方法，但他们却不能回答“某物有多少”的问题，研究者们摆出一些计数器，把它们放在一边后研究者要求这些儿童跟着他们做。
Since the children were too old for the baby-staring trick, but unable to answer the question: "How many?", researchers laid out counters, then put them away and asked the children to "do as I did".
把画面一分为二，在引导观赏者目光流经曲折蜿蜒的起伏山岭后，又进一步把观赏者的视点迫入前景一大片明朗和煦的绿色原野。
The binary structure of the canvas leads the viewers to follow the undulating mountain range, while also being drawn into the bright, wide green field in the foreground.
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