如果遗漏了空方括号对，这是一个编译器无法发现的错误，将导致程序在运行时出错。
If the empty bracket pair is omitted, it is an error, but an error that the compiler is unlikely to catch; the program may fail at run time.
您不用再去做其他任何事，以让您的应用软件在运行时与数据库联系起来，这种操作通常是复杂，且容易出错的。
You do not have to do anything else to get your application to connect to the database at run time, which is often a complex and error-prone task.
如果不能验证数字签名，则运行时退出并给出错误信息。
If the digital signature cannot be verified, the runtime exits with an error.
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