=LOOKUP(--TEXT(C2,"mdd"),{101,"摩羯座";120,"水平座";219,"双鱼座";321,"白羊座";420,"金牛座";521,"双子座";621,"巨蟹座";723,"狮子座";823,"处女座";923,"天秤座";1023,"天蝎座";1122,"射手座";1222,"摩羯座"})公式怎么理解?这里面的{}是什么意思?