Of those, 45 were upheld, including one of unwelcome physical contact and three of being in a state of undress. Most related to inappropriate sexual language and humour, and also culturally insensitive or racist comments.
public companion object {
，这一点在safew官方下载中也有详细论述
On top of that, we can get two full pixels of color using foreground and background colors. If we render an upper block with a foreground color of cyan and a background color of red, we get a cyan pixel sitting on top of a red pixel!
缺点：容易饱和（输入过大或过小时梯度接近0，导致梯度消失）