使用这些像素坐标用于渐变标绘的地图中，随后图像将被加注普通框、图像和直线。
Using these pixel coordinates for the shaded plotted map, the image is then annotated with the usual boxes, images, and lines.
CanvasAPI是一个低级画图api，它支持创建直线、曲线、多边形和圆圈，并用彩色、渐变色等填充它们。
The Canvas API is a low level API for drawing. It lets you create lines, curves, polygons, and circles and fill them in with colors, gradients, and so on.
输入框背景中淡淡的垂直线性渐变。
分流比较小时，渐变截面直线流道入口具有更好的压力特性和分离特性。
When the spilt ratio is small, the gradual change section linear inlet has better pressure characteristic and separation characteristic.
默认情况下，双色渐变是沿指定直线从起始色到结束色的均匀水平线性混合。
By default, a two-color linear gradient is an even horizontal linear blend from the starting color to the ending color along the specified line.
确保选中默认的渐变（黑和白），用鼠标拖动一条从左到右的直线。
Make sure that you have the default palette selected (black and white )and with your mouse drag a similar line. From left to the right.
轴向速度的径向梯度沿轴向向下逐渐变小，轴向速度分布也逐渐趋于水平直线状。
On the contrary, the radial gradient of axial velocity decreases downwardly along the axial direction. Therefore, the axial velocity distribution becomes horizontal gradually.
轴向速度的径向梯度沿轴向向下逐渐变小，轴向速度分布也逐渐趋于水平直线状。
On the contrary, the radial gradient of axial velocity decreases downwardly along the axial direction. Therefore, the axial velocity distribution becomes horizontal gradually.
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