048_最小值，实际值，最大值之间的选取表达式

V = Math.round(thisComp.layer("Control").effect("%(百分比)")("Slider"))

T1 = thisComp.layer("Empty").text.sourceText

T2 = thisComp.layer("Full").text.sourceText

m = thisComp.layer("Control").effect("Min (最小阈值)")("Slider")

M = thisComp.layer("Control").effect("Max (最大阈值)")("Slider")

V<m ? V=T1 :  ( V>M ? V=T2 : V=V+"%" )