| ! |
[if !IE] |
The NOT operator. This is placed immediately in front of the feature, operator, or subexpression to reverse the Boolean meaning of the expression.NOT运算符。这是摆立即在前面的功能，操作员，或子表达式扭转布尔表达式的意义。 |
| lt |
[if lt IE 5.5] |
The less-than operator. Returns true if the first argument is less than the second argument.小于运算符。如果第一个参数小于第二个参数，则返回true。 |
| lte |
[if lte IE 6] |
The less-than or equal operator. Returns true if the first argument is less than or equal to the second argument.小于或等于运算。如果第一个参数是小于或等于第二个参数，则返回true。 |
| gt |
[if gt IE 5] |
The greater-than operator. Returns true if the first argument is greater than the second argument.大于运算符。如果第一个参数大于第二个参数，则返回true。 |
| gte |
[if gte IE 7] |
The greater-than or equal operator. Returns true if the first argument is greater than or equal to the second argument.大于或等于运算。如果第一个参数是大于或等于第二个参数，则返回true。 |
| ( ) |
[if !(IE 7)] |
Subexpression operators. Used in conjunction with boolean operators to create more complex expressions.子表达式运营商。在与布尔运算符用于创建更复杂的表达式。 |
| & |
[if (gt IE 5)&(lt IE 7)] |
The AND operator. Returns true if all subexpressions evaluate to true AND运算符。如果所有的子表达式计算结果为true，返回true |
| | |
[if (IE 6)|(IE 7)] |
The OR operator. Returns true if any of the subexpressions evaluates to true.OR运算符。返回true，如果子表达式计算结果为true。 |
