Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, TertiaryColour, BackColour, Bold, Italic, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, AlphaLevel, Encoding
Style: Default,simhei,15,&Hffffff,&Hfcc4a5,&H000008,&H000008,0,0,1,1,1,2,30,30,10,0,1
对应MarginV的那个值就是要改的值
顺便说下这个：Alignment.对齐方式(SSA). 1=Left, 2=Centered, 3=Right. 值加4 意味着在原来的对齐方式上加上顶部对齐. 加 8意味着在原来的对齐方式上加上中间对齐.
