For example, the large horizontalgradient (1) pulls the eye along the width of the page.
例如，大的水平渐变(1)引导眼睛横向注视页面。
2
The horizontalgradient of the declination (D) varies not only with latitude, but also with longitude.
磁偏角（D）的水平梯度不仅随纬度变化，而且随经度变化。
3
The background light influences phototaxis of round scad on the horizontalgradient condition, the influence weakens with the increasing light intensity.