level run meaning in Chinese

水平飞行

Now you need to shift and drag your back ground image up or down so that the horizon / eye level runs along the centre guide line
（现在你需要上下拖动你的背景图片，直到图片中的地平线与中间的参考线重合。）
This paper adopts the method of two level classfications to carry out recognition , by which we put forward a kind of method based on unit circle projection to class approximately and use texture feature based on gray level run length matrix to class accurately and gives the last output
本文采取两级分类识别的方法:其中提出了一种基于单位圆投影的方法将待选字进行粗分,并结合基于游程矩阵提取纹理特征的技术进行细分并识别。