Passing this value to two entries rather than just one allows you to limit the extent of the smooth interpolation ; just one middle color entry driven by the expression value would create the results shown here 传递这个数值到两项上强于只传递给一项,它允许你去限制光滑插补的范围;只有一个中间项通过表达式来驱动后创建的效果在这儿显示。