Move the throttle stick back to mid position-- swashplate moves to the mid point of its travel. 将油门操纵杆移动到中间，倾斜盘移动回行程的中点。
The color gradient is a smooth shading of colors from the center point of the path to the outside boundary edge of the path. 彩色渐变是从路径的中点到路径的外边界边缘的平滑的彩色渐变。
