1. 静态类型(Statically Typed)：A language in which types are fixed at compile time. Most statically typed languages enforce this by requiring you to declare all variables with their datatypes before using them. Java and C are statically typed languages.
2. 动态类型(Dynamically Typed)：A language in which types are discovered at execution time; the opposite of statically typed. VBScript and Python are dynamically typed, because they figure out what type a variable is when you first assign it a value.
3. 强类型(Explicit Typed)：A language in which types are always enforced. Java and Python are strongly typed. If you have an integer, you can‘t treat it like a string without explicitly converting it.
4. 弱类型(Implicit Typed)：A language in which types may be ignored; the opposite of strongly typed. VBScript is weakly typed. In VBScript, you can concatenate the string ‘12‘ and the integer 3 to get the string ‘123‘, then treat that as the integer 123, all without any explicit conversion.