如果： where （1=1 and a>1 or b<1） and (c=1) order by d asc;
写法：
SqlExpressionGroup exp = Cnd.exps("1", "=", 1);
exp.and("a", ">", "1");
exp.or("b", "<", "1");
exp.andEquals("c", "1");
...............................
结果不对，求解