eq相等 ne、neq不相等，
gt大于， lt小于
gte、ge大于等于
lte、le 小于等于
not非 mod求模
is [not] div by是否能被某数整除
is [not] even是否为偶数
is [not] even by $b即($a / $b) % 2 == 0
is [not] odd是否为奇
is not odd by $b即($a / $b) % 2 != 0
示例：
equal/ not equal/ greater than/ less than/ less than or equal/ great than or equal/后面的就不用说了
从Iteye的Franciswmf开发笔记转载