Another new type of expression, a range expression, is simpler and was covered earlier.
除此之外还有一种新的表达式，即范围表达式，我在前面已经介绍过。
The resultant type of any expression.
所有表达式的结果类型
The type argument is the type of the value the expression evaluates to.
类型参数就是表达式要计算的值的类型。
This saves you the trouble of having to re-type the regular expression every time.
这样您就不必每次都要重新键入正则表达式。
The dynamic type of an rvalue expression is its static type.
一个右值表达式的动态类型，就是它的静态类型。
If the expression identifies an element, that element must be of a simple type.
表达式标识一个元素，则该元素必须是简单类型。
Returns a string that identifies the data type of an expression.
传回可识别运算式之资料型别的字串。
The expression of ST showed strong positive, and plasma type;
ST呈强阳性表达，其表达形式为胞浆型；
The expression of ST showed strong positive, and plasma type;
ST呈强阳性表达，其表达形式为胞浆型；
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