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。

youdao

The task of reconstructing the worm’s wiring system fell on John G. White, now at the University of Wisconsin.

重建蛔虫回路系统的重任目前落到了威斯康星大学的约翰·G·怀特身上。

youdao

The task of reconstructing the worm's wiring system fell on John G. White, now at the University of Wisconsin.

重建蛔虫回路系统的重任目前落到了威斯康星大学的约翰·G·怀特身上。

youdao

White House officials say President Obama met with five hemispheric leaders at the G-20 summit.

VOA: standard.2009.04.15

Asian Americans who remembered the internment camps of World War II, laborers who worked for white plantation owners on the mainland, minority war veterans who fought side by side with white G.

CNN: For better or worse

Last month, no less an authority than the White House posted an image on its new Tumblr feed advocating for the hard-G.

CNN: It's settled! Creator tells us how to pronounce 'GIF'