But we know another vector that is also perpendicular to the level set of g. That is the gradient of g.
但我们知道有另外一个向量也是和g的等值面垂直的，这个向量就是g的梯度。
That means that the gradient of f is perpendicular to the level set of g.
也就是说f的梯度向量,应该与g的水平集垂直。
Using the gradient Tool (g) with a Black to 0% opacity gradient, click and drag a gradient from the bottom up into the planet for the bottom and from the top down for the top of the planet.
使用渐变工具，设置黑色到0%不透明的渐变，从画布底部向上点击拖拉渐变到行星位置，然后，从画布顶部点击拖拉渐变到行星顶端。
Click on the gradient Tool (g) and using a Black to 0% opacity gradient click and drag the gradient from the top of the photo to about where the mountains start.
选中渐变工具(G)，使用从黑色到0%不透明度的渐变，在图片上部点击并拖拉到山顶位置。
Set your Foreground color to #00315C and Background to #001B32 and choose the Gradient Tool (G) with a gradient type option set to Radial Gradient.
设置前景色为 #00315C ，背景色为 #001B32 ，然后选择渐变工具（G），渐变类型为径向渐变。
Then grab the gradient tool (shorcut ‘G’ on the keyboard) and setup a white to gray to white gradient like the one referenced below.
选择渐变工具（快捷键“G”），设置一个白-灰-白的渐变，如下图。
The gradient of g in yellow. And you see, in most of these places, somehow the two gradients are not really parallel. Actually, I should not be looking at random points.
用黄色画出g的梯度向量，然后你看，一般情况下，这两个梯度向量都不平行的,事实上，我不应该这样随便找个点画给你们看。
Next, select one shape and use the Gradient Tool (g) to click and drag at a 45 degree Angle across the leaf half shape.
其次，选择其中一个形状和使用梯度工具(克)单击并拖动在一个45度角的整个叶片形状的一半。
Choose the gradient Tool (g) and with a black, white linear gradient drag from down to top.
选择渐变工具，选择黑-白线性渐变，从下往上拖动(下图中红线所示，从下往上拖动)。
Click on the gradient Tool (g) and, using a Black to 0%opacity gradient, click and drag the gradient from the top of the photo to about where the mountains start.
选中渐变工具(G)，使用从黑色到0%不透明度的渐变，在图片上部点击并拖拉到山顶位置。
The shear zone boder and the belt of the transition between the secondary shear zones where the stress gradient changed g...
成矿的有利部位是剪切带的边缘及次级剪切带问的过渡地带，它们是剪切带内应力梯度变化大的地带。
Create a linear gradient using the gradient Tool (g) set to white and transparent. Then drag and drop from up to down to achieve something similar to below.
创建一个图层，使用渐变工具(G)设置为白色和透明的线性渐变。然后从填充，就像下面一样。
Use the Gradient Tool (G) to squish and reposition the gradients.
应用渐变工具（G）调整渐变的形态和位置。
Make a mask for this layer. Then using the black Gradient Tool (g) set to Radial, lighten the ladybug, as I did below.
为该层设置图层蒙版，然后使用渐变工具(径向渐变)前景色设为黑色，就像刚才那样加亮瓢虫的部位。
Make a mask for this layer. Then using the black Gradient Tool (g) set to Radial, lighten the ladybug, as I did below.
为该层设置图层蒙版，然后使用渐变工具(径向渐变)前景色设为黑色，就像刚才那样加亮瓢虫的部位。
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